My mother's best friend

My mother 53 divorced and I 34 her only child live together and doing okay. My mother works and I'm employed as a security guard, working mainly nights. I'm home alone most days and usually sleeping after working 12 hours shifts. My mother has a friend I call Linda 49 widow and she has a daughter Karen 28 who is a quiet and shy girl. Anyway, Linda started visiting me and we started fucking for our mutual benefit. My mother finally caught me up to my nuts in Linda, but she joined us instead of complaining about us. After now having regular sex with my mother and her best friend, my mother wanted Linda to move in with us. Linda had Karen living with and so Karen would live with also, but my mother and Linda decided Karen needed fucking and they worked on Karen and thus I fucked Karen. But me fucking Karen was only part of their plan as they wanted us to marry and give them grandchildren. As it turned out, once was enough to get Karen pregnant and a quick wedding followed. Still fucking my mother and Linda as well as my wife Karen, who is pregnant again with our second child. As they say we keep it in the family.