maybe he hasn't been laid in a while and kinda zoned out staring at a banana, forgetting his sister is there. that's what I got out of it at least

you never look at any when eating any food . that way you wont be in an awkward position

Your therapist is going to want to hear this one, OP.

Welll for all those incest comment, haven't you thought he had a boner thinking of eating someone's banana?

Well someone might be gay..

At least you recognized it was wrong!

could have gone way worse

Incest eww. You must have been thinking something while she was eating that banana. I'm not sure, what's wrong with you OP or maybe your just a teen with raging hormones. Control yourself next time

Did you know that the state with the highest rate of incest is Alabama? The more you know.

I don't think I would've let the world know about this one. Ps we're all pretty normal down here in Texas:-P