Half sister/cousin question
This is a little weird...but without a ton of details. There is a chance that my first cousin is really my half sister. I had found out several years ago that my mother had an affair, and I didn't know who. I have recently found out that there has been a longstanding affair with an uncle (dad's brother) urgh and yuck. However, when I was told about the affair by my mother years ago, she said how old my sis was and 9 months later me. Now this has bothered me for about 13 years now and my cousin and I want to get DNA testing to find out. My question...how do we go about telling the rest of the family if the results are what we think they are? Do we tell them? Does everyone already know except the kids? I am at a loss, at this point we are gonna have the test because we need to know.