Man of my Dreams

I'm Jessica 24 and early last year I met David 26, we hit it off instantly and were soon sleeping together. Then I moved in with him, everything was going great, isolating together only made bond more. Then David asked me to marry him, as I was his soulmate and I accepted his proposal. Only then did we discover that we were closely related, after having blood test for our up coming wedding. It was found that we were related, but after a D N A test, we were proven to be brother and sister thru my late father Charles. The family had known that Charles had another child before marrying my mother Jane. But the woman had left with the child and Charles had moved on with his life. She had left before the birth of the child and Charles didn't know if it was a boy or girl. They never were in contact again. David had lived with his single mother till she passed away from cancer in 2017 and he moved for work and didn't know anything about his father and his birth certificate didn't show a father's name. As I'm am already pregnant we had every test there was to see if the baby is okay and all test show that he is fine. David is uncertain about what to do and I still want him. I have told him we should still marry and he is thinking it over.