My mother in law

I'm James 29 married to Kirsten 27 and we've 1 child, I'm wasn't liked by my mother in law Margaret 59. Mainly because I got Kirsten pregnant and we married, but we both worked for Kirsten's family company and still do. Anyway I inherited money from my uncle Andrew and it was a large amount to me. I shared the estate with my 3 siblings and I got a quarter and I had no plans made to use it and it was in our joint bank account. Margaret had a car accident and was drunk at the time and wanted to keep it quiet from Ronald her husband. He was away with Kirsten on case and in the same town as my parents, so they were taking care of Linda 1 our daughter. While Kirsten was in court with Ronald, so Margaret had missed a corner and ended up in a ditch. Not much damage to the car except for broken axle on the front driver's side. Margaret rang me and asked me to get her car fixed and keep it all quiet from Ronald 68. I had a friend who worked at a repairers and they picked up the car and repaired quickly and it was back in 2 days. The work was done all on overtime and I paid myself. Margaret paid me back within a week, she didn't like me having anything over her and wanted to know what it would take to remove it. Margaret is a sexy looking woman and she was desperate to keep me quiet, I wasn't going to tell Ronald as it would upset Kirsten. But as I was home alone for most of a month and a little horny. I thought I would see how far Margaret would go, if she got angry and threaten to tell Kirsten. I would I was just say I was teasing her as she had been running me down since Kirsten and me married. But to my surprise she agreed and she started spending the nights with me and I could do anything with her. Straight sex, blowjobs and anal nothing was out of bounds, I quite like fucking Margaret and now 7 months later I'm still using her when Kirsten is away. It seems Ronald isn't doing Margaret much at all if any and has gotten use to me fucking her and wants more of it. Kirsten is also pregnant again and if she doses as before she won't want sex till after the birth by next month and so I'll make up the different with Margaret. Kirsten has notice a change in her mother's relationship with me and puts it down to her acceptance of our marriage.