Sorry to bother you!!

I'm looking for a yaoi. I remember quite a bit about it but still can't find it. The uke is an older man who is paralyzed below the waist. He is married but is unable to satisfy his wife and decides to hire someone to do so for him. This person is the seme. The seme is a younger man with medium length hair, I think. The uke watches the seme have sex with his wife. In the middle of the night well the uke is asleep the seme come into his room and starts having sex with him. The uke wakes up but cannot feel it and the seme makes a comment. Later on the seme kills the ukes wife because she wants to run away with him after killing the uke. The uke can suddenly get it up. Can someone please help!!!