A few weeks ago, a sexual relationship developed between my younger sister and I. We are both in our forties, so there is no coercion or real power dynamics, we made the choice to break the taboo due to us becoming closer since my sister moved in with me. My sister has an allergy to latex, so condoms are not an option for us, and as a result we have gotten quite careless. My sister said she would get on the pill, but I'm afraid it will be to late then, as I don't even pull-out anymore, any my sister seems fine with this. I'm waiting any week now for my sister to tell me she's pregnant, and to be honest with you, a part of me wants her to have our child, as we are very much in love at this point.