This is Kyle Jones, 31, from Pittsburgh, Pennsylvania, and his 91-year-old lover Marjorie McCool.
In 2009 he met great grandma Marge in a bookshop where she was working.
She says: "The physical side of our relationship is wonderful. I amaze myself, he amazes me."
Kyle's not monogamous – he's also dating 68-year-old great grandmother Anna Roland, whom he met on a dating website.
His mum, Ceceila, 50, is totally cool with it.
Here's Kyle's full story.