Secretly cheating on her husband in the hotel room

He is my best friend, but he does not treat his wife with affection. She came to my massage parlor to ask for my services because she knows that I am excellent in my work. I could not say no because I hold her in high esteem. I started to massage her back and she said I was very good. Moreover, from time to time, she moaned for pleasure, which made that my cock became hard as a stone. She discovered it and asked me to fuck it. I know that my friend has problems with his penis and that his sex life is not pleasant, so I could not refuse to please his wife. I buried my cock on her and I did it without contemplation until I filled the hole in her ass with my hot milk just out of my cock. I’m sure she will come home very happy and she will not fight my friend, so I think I did a good deed.