I have been having an affair with my friends sister now for a few months ( we have sex sometimes in hotels or when her family is out) and its great fun and she's great but I'm worried about how my friend would take it if he found out.
The fact that she is younger than me, (she's in the year below - is 16 though) I feel makes it a bit worse. I feel as if I want to end it but I can't as she's just so attractive and I can't keep myself away despite the risk.
To make matters worse, my friend arrived home (at her house) while we were having sex, (we knew it was him coming in the house) so we got up immediately and got dressed, (I had to jump from the second floor window and go out the gate for him not to find me). She told me that she put a dressing gown on and had the intention of telling her brother (my friend) she was having a rest however when he came up and into the room, he saw the condom packet which was on the floor, so he basically knew she had been having sex with someone. She texted me and was in a panic, however she managed to make him keep quiet saying that it was just a boy from school (not naming names obviously).
I feel as if we continue I might get found out, should we stop or go to hotels (this is expensive though), she doesn't have any intention of stopping and is texting me about meeting up for sex again and is even talking about a blow job for my birthday, which quite frankly is the only thing I can think about at the moment and her.
Plz help what should I do?