We've all been schooled by our parents on respect, and calling them by their first name is one thing we knew we could never do.
So, was Farrah doing this as a defiant act of disrespect? Nope. Despite the fact that we've seen them argue a lot on the show, and the reality star is all-too-familiar with people accusing her of being disrespectful, Michael himself explained why Farrah doesn't call him dad and he's not mad about it.
During Part 2 of the Teen Mom OG reunion, Michael (who was rocking a "Team Farrah" shirt), revealed how the whole thing started.
"My stepdaughter, which is her stepsister, she started calling me Michael, it was just one of those family things, it never bothered me," he revealed. "I mean, I know where Farrah's heart is and she does call me Dad now and she does call me Father."
Also during the show, Michael revealed why he and Farrah's mom were getting divorced and we're not gonna lie, we were shocked.