Fucking My Sick Friends Wife

So I'm staying at my friends house at the moment. He is 31 and his wife is 37. They are very good friends of mine both her and him. I've always found his wife, Sam, so attractive and have often fantasized about giving it to her good. My girlfriend recently left the country to look for more opportunities elsewhere so I've gone without sex for about two months. Anyway yesterday me and her husband got back from a trip and he was feeling really sick and dehydrated. He headed to bed early while Sam and I stayed up watching TV and talking. Me and her got on really well and there has always been a little bit of sexual tension between us but given our relationship and the fact that we work together it's always been just that, a fantasy... Until last night. We were sitting on the couch with only the light of the TV shining the in the room.. All of a sudden I felt her hand on my thigh, I ignored it at first but it stayed there so I did the same and placed my hand on her inner thigh. She looked at me and we started kissing. Before I knew it my hand was inside her underwear and her pussy was dripping wet. She took my cock out and began sucking on it. It was good shit. I took off her pants and fucked her right there on the couch. We couldn't make too much noise because her husband was in the next room. We had hard sex for a good half hour and it felt sooo fucking good. I came in her mouth and face. She went to the room to check on her husband while still covered in it. I feel sort of guilty but also so satisfied. I really want to fuck Sam again especially if her husband is in the same house!
Thanks for reading