"The amount of love I've received is crazy and I didn't expect any of it, but I'm so grateful," the teen said.
The gesture everyone is applauding isn't uncommon for the husband.
"Jon goes to every doctor's appointment, every blood test, every surgery, every radiation," Mackenna's mom told BuzzFeed News. "And, as you can see, if he can't be by my side he is as close as he can get!"