1. This woman's dog gave her quite the surprise.
"I had been dating my live-in boyfriend for about a year. One night, while I was walking our dog, the dog pooped out a condom. I was on birth control, and we had not used condoms in about six months. When confronted, my boyfriend said, 'Can we just take a second to appreciate the fact that I was using protection?'"
2. This girlfriend got a Valentine's Day dinner surprise.
"He said he was sick on Valentine’s Day and couldn’t go out to dinner. I still had a reservation, so I took my dad instead. As we were walking to our table, guess who we saw sitting nearby with a girl from my chemistry class? Dad absolutely let him have it in front of the whole restaurant. It was glorious."
3. This person heard the news from a very observant step-son.
"I returned home from a job interview in Houston and had a bonding date with my step-sons. The youngest one hugged me, and I told him how much I loved him. He turned and said that Jenna loved him and his brother as well. When I asked who "Jenna" was, he told me that while I was gone, she had come to my home, slept with their dad, and invited friends over. I packed up and filed for divorce the next day."
4. This girlfriend saw the truth come through the ER doors.
"I was working the night shift at the ER when an MVA (motor vehicle accident) involving my boyfriend and his other girlfriend came in. It was hard to get this kind of news at work, but I didn’t cause a scene. I just told him that I had called his mom, and that the ‘other woman’ was fine too. The color drained from his face, and he started stammering as I walked out of the room."
5. This woman quickly put two and two together.
"I was diagnosed with cancer and was going through treatment. I went home early one day to surprise my husband, and I walked in on him and our marriage counselor going at it — in our bed, while she wore my favorite pair of boots. Turns out, my cancer was caused by HPV. He’d been cheating on me the entire 10 years we’d been together."
6. This boyfriend forgot that his girlfriend followed him on Insta.
"He forgot that I followed him on Instagram, and he posted a sonogram of a baby he was having with someone else."
7. This girlfriend saw his texts in real-time while using his phone for GPS.
"We were driving to another state for a week-long vacation. It was 1 a.m. and I was driving while he slept. He had given me his phone for directions, and while I was looking at it for directions, his other girl was texting him nonstop. I snooped and found texts, pictures, videos, and phone calls. I confronted him when we got to the hotel, but he wouldn't admit it. I grabbed my bags, booked a flight, and was home within the next four hours. I blocked him and never spoke to him again."
8. This girlfriend listened in on a VERY revealing pocket-dial.
"He pocket-dialed me while he was at work, and instead of the standard background noise and mumbled voices, I heard him talking about all the women he was cheating on me with. When I confronted him, he got angry at me for listening to my own voicemail and then insisted that I didn't hear what I heard."
9. This boyfriend learned the truth from an Instagram photo.
"I dated this girl for a couple of months one summer. Shortly after we broke up, she had a new boyfriend. Less than a year later, she posted a one-year anniversary picture of them on Instagram. We were still together a year ago that day."
10. This person saw the truth sitting in the driveway.
"Back in high school, I texted a friend to see if she wanted to go out, but she said she already had plans. So, I texted my boyfriend to see if he wanted to go out, and he said he was staying in with his family that night. Later that night, I was dropping my sister off at soccer practice and had to drive by my boyfriend's house to get there. I saw my friend's car in his driveway. I texted my boyfriend's sister to see if she was there, and she told me that my friend and my boyfriend had gone to the movies together."
11. This woman saw photos of her S.O. on a BDSM site.
"I googled his Tumblr username to find that it was being used on a BDSM website. I quickly made a profile so I could view his, and I saw that it was littered with pictures of him having sex with another woman. He had the nerve to say it wasn't him, so I messaged the girl and she confirmed everything. Only then did he come clean."
12. This person caught her boyfriend cheating right above her head.
"He was cheating with my upstairs neighbor. One day, I heard A LOT of noise coming from the apartment. I went upstairs to ask them to keep it down and discovered my boyfriend with my neighbor. Super awkward moment."
13. This girlfriend found out about his second Snapchat account.
"I found out that he had another Snapchat where he posted a cutesy video about another girl. He lied his way out of it, but I decided to give him a chance. A month later, I found the girl's Instagram profile with photos of my boyfriend. He tried to lie about it again and said he hadn’t seen the photos even though he had liked them."
14. This person had the truth delivered in the form of a letter.
"We were in a long-distance relationship, so I went to visit her and found a love letter from her 'ex.' Turns out, they never broke up. We dated for six months and backpacked around three separate countries together. Her 'friend' that flew across the world to visit her was actually her girlfriend."
15. This person learned that she had actually been "the other woman" for two years.
"I dated my ex for two years. The whole time she complained about her ex-girlfriend and talked about how much she hated her. When we finally broke up, I used my friend’s Facebook account to check my ex’s profile. I saw that she was 'in a relationship' with her ex. I messaged the ex in question and nonchalantly asked how long they had been together. Her answer? SIX YEARS. They had never broken up and I had been the other woman for two whole years!!"
16. This woman caught another girl writing a romantic post on his Facebook wall.
"It was Valentine’s Day. I was on Facebook and saw that the guy I loved had a new post on his wall from a girl saying she couldn’t wait 'to see you tonight, Valentine.' I immediately posted on his wall, 'Tsk tsk, more than one Valentine this year?' HE DELETED MY POST. I immediately texted him and all he could say was, 'I had previous plans with her, but realized that I loved you, and I couldn’t just break plans with her.'"
17. This girlfriend swiped a little too fast on the camera roll.
"My girlfriend went to show me and my family pictures of her newborn nephew and accidentally showed us texts between her and someone she had been secretly dating for months."
18. This girlfriend literally went the extra mile to call her boyfriend out.
"My boyfriend butt-dialed me, and I heard him and some other girl starting to get into it. I left the line open, drove to his place, and let myself in with the key he had given me. He tried to play it cool until I showed him the open phone line I had been listening to. The girl had no idea he had a girlfriend. We both chewed him out and left."
19. This woman learned the truth during a visit from her boyfriend's parents.
"His parents were in town, so they invited me to lunch and gave me a gift bag full of baby stuff. I was definitely not pregnant, but he had told his parents that I was. His dad called him, and he confessed everything. I guess one of the girls he had cheated on me with had gotten pregnant, and somehow he thought telling his parents I was pregnant was a foolproof idea with zero flaws."