Horny Mother in Law

Long story short I'm Daniel now 27 married 2 children 8 & 6, I married at 20 to Jane then 17 and we started to live with her family on their farm. I'm now a qualified mechanic, but still training when I married Jane. Jane's father Patrick now 49 run the farm and her mother Katherine now 45 is a qualified accountant and has an office in our local town, next to the garage I worked for and have since bought. Shortly after the wedding, Katherine's car broken down and I was just closing up the garage and the only one left there. She came to the garage looking for someone to fix her car, I went and had a look at it and found it was just the fuel filter was blocked and soon had it replaced. As I was working on the car she ran her hand up my leg and gave me a feel up. Once I was finished she invited me into her office and we had sex for the first time, Jane was in the last month of her pregnancy and I wasn't getting sex from her. This was the start of a sexual relationship with Katherine that's still going today. After the birth of our first child, I wanted to move my family into the town. But Katherine arranged for another house to be moved to the farm and had fixed up for us to save renting a house in town. Jane was then happy to stay at the farm and I agreed after a little while. Then it became regular for me and Katherine to drive into town for together and this meant one of would have to wait for the other if they were going to be late finishing. This happened sometimes, but we stayed back late at least once a week fucking. Katherine when on a holiday with Patrick and got pregnant to him, there was no doubt about who the father was as I always used condoms with Katherine up and till last year. She still wanted sex during her pregnancy, a lot more than Jane did. Jane is pregnant again with our third child which is due in November and I can ask Katherine for a fuck and she will agree anytime I want. Jane's parents help us buy the garage late last year and don't want to be paid back and I keep the machinery on the farm running for the cost of any parts only. That was Patrick's idea, that how it is now and everyone is happy.