I am a married bisexual guy. My wife has no idea what I get up to behind her back.

Right now I'm parked in a petrol station car park waiting on a phone call from my 63 year old married male lover. He will call when his wife is gone to work and the coast is clear for me to go to his house. When I get there we will have unprotected anal sex (him fucking me) and he will ejaculate in my ass, just like he does every time.

I always feel guilty after but I can't resist that satisfying feeling of a large dick in my ass.