Called Out So I Had To Do It

My wife's step mother is a real bitch. She's never happy about anything and one day she overheard me tell my wife that she just needs a good fucking to adjust her attitude. I didn't know this until one day I was asked to go to her and my father innlaw's house to look at their AC unit. I am an HVAC technician so I agreed to, being the good son in law that I am. When I get there she's the only one home and the father in law is gone for the weekend fishing. So I check the unit and it's a little low on Freon so I charge it up. She offers me some lunch and I agree since she had it on the table already. Then she says I heard you say I was a bitch and needed a good fucking to adjust my attitude. I was embarrassed at first but took the opportunity to say well you never seem very happy and maybe it would benefit you to talk to Bob and get it taken care of. She confides that Bob can't get it up anymore and she hasn't had real sex in years. I felt bad for her, even though she's a bitch. She's a good looking woman for 58, tall, thin redhead. No tits to speak of but a decent ass.
She said, if I promise to never tell anyone would like be willing to fuck her? She'd let me do anything I wanted even anal. My wife doesn't like anal and only lets me have it on my birthday so I was tempted.
I couldn't resist, I know I should have. But wow. It was the hottest sex I ever had. We fuck regularly now, and I get anal all the time. I don't think I can stop, and her attitude has improved immensely. My wife even commented that she thinks Meg is getting laid now because she's been really nice lately.

If y'all want, I will give more details about this hot older woman that I can't resist fucking .