Is selling undies cheating?

Jessica
Hi there. I am 21 and i dont have much money so i started selling my undies. I make like 30 bucks per undie and i used the money for my bills. But the thing is i have a fiance.. Basically all i do is wear them, put them in my onlineshop and sell them. No dirty talk, no touching, no intimate thing or anything like that. I really need the money but i have a horrible feeling doing this without letting him know :/ What do you think?