Homecoming

I'm David 31 married 1 son, early last year before the pandemic started. I was single and I returned home from years working overseas. I headed straight to my family home and my only sister Elaine 27 single. Our parents died in a terrorist attack in in 2001, we were then raised by our only grandparent who passed away in late 2015. I went overseas to work and Elaine stayed behind going to university. Neither of us are great in having relationships, I got sex regularly while overseas and but paid for all of it. Both still single and only one relation we knew of left. Joan 29 a cousin on my father's side and now my wife being a third cousin allowed us to marry. She wasn't good at relationships and had lost her job shortly after the pandemic struck and came to live with Elaine and me. With lockdown starting the 3 of us were together all the time and I got horny and started to masturbate myself. But on catching Elaine also masturbating herself, we started fucking each other. Elaine was careful and didn't get pregnant, we also got Joan to join us and and started having regular threesomes together. Joan wasn't as careful as Elaine and she got pregnant, I decided to do the right thing and we married in November 2020. With the arrival of our son John, Elaine got motherly and also wanted a baby and as we were all still sleeping together every night since starting our group sexual relationship. She stopped taking precautions and is now pregnant with a girl according to the doctors and the baby is very healthy. Both Joan and Elaine enjoy having a personal sexual relationship between themselves without me, but also are both happy to include me as well.