Pregnant Wife Plus

My wife was pregnant with our second child and was having bad morning sickness. So, her mother (divorced) came to stay with us and allow her daughter to cope better. No problem, I get on very well with my mother-in-law and one rainy weekend with our 2year old with my parents. We were all alone just the 3 of us. It started with my wife wanting a massage and me and her mother massaging her, and it evolved into a threesome. My wife involved only orally and me fucking my mother-in-law. From then on, the 3 of us shared the same bed and still do today, Five months after the birth of our second child.