Married with Children

I'm Brian married 4 children, my wife Karen has given 3 children and her sister Monica 1 child. It all started late 2020 Karen and Monica's parents both died of the coronavirus and they inherited their parent's estate as their only children, Karen, me and our two children in with Monica. Karen 30 and I have been married 5 years since university and those doing well hadn't yet got our own house and so we rented. Monica 26 still lived at home with her parents until their passing was quite shy around strangers, not in any relationship or had any either. Karen and Monica came to an agreement. Monica would run the house and Karen would continue her career. Monica didn't have any career and living together Monica could hear Karen and me fucking and she asked Karen all about it. Karen knew Monica would never have a sexual relationship of her and decided on my birthday March 2021 to give me a threesome with her and Monica as mu birthday present. Also getting Monica laid, we ain't no centerfold models but were great as far as we're concerned. She asked Monica was she willing to join us and after thinking awhile she agreed. It was big surprise for me on my birthday night having 2 naked women join me in my bed. I was told by Karen I would be getting something special in the bedroom. I wasn't disappointed either, but a little shocked at first having Monica joining us. Anyway we had a great time and I took Monica's virginity and as it turned out got her pregnant. Karen hadn't got pregnant the first time we fucked and so she thought the old wives tale you can't get pregnant the first was true. It wasn't, but be fair I fucked Monica twice that Saturday night. Also Monica joined us in our bed every night since then so not to reject her and let her leave when she wanted too. She hasn't and we now expect her to join us every night as if it's a normal family relationship. Karen got pregnant again in June and we're living happily together. Monica is the stay at home mother and Karen continues her career. Monica is a regular sex partner for me and Karen and is hoping to have another child as well and Karen wants her to have another one at least she said.