I lost my virginity to my friends mom. Please help!?

When I was 16 I slept over at my friends house. We are good friends. Well I slept over and we had known each other for a year and this was my like 1500 time sleeping over. Well his mom is a total Milf she is about 32 great everything. Well one night while I was sleeping in the guest room, I took my pants off because I always sleep in boxers and fell asleep. Next thing I know, I wake up with my penis getting sucked by his mother. From there we had sex. After we finished I asked her why and she said she walked in to give me pillows that day but my penis was hanging out from my boxers :/. She admitted to me that she had found me attractive for a while and since then I meet up with her every time my friend is at his dads or work, I'm 17 now. It doesn't bother me because she is a single mom and obviously needs some sex once in a while. And it suits me, she gives me money sometimes and we go out and eat smoke weed and have fun sometimes. Well now I think she really has to tell my friend what's been going on.