I've just found out that my big sis has been looking at my diary when I've been out. And now she knows that I've got a massive crush on her boyfriend! Teasing and mocking me, she reminds me of what a loser I am and makes me to undress. She tells me I have to do as she says, otherwise she will tell him my secret. There's no way he'd ever slept with someone like me, so there's only one way to get his cum...eat their used condoms. One more thing - I just found out that sis has just came back from his, and this time they decided to go bare. So guess where I'm eating it from?