My wife gave birth to a (biracial)baby that clearly isn't mine, and I'm divorcing her. But I'm worried about the relationship between my two kids and their new half-sister.

A month ago, my wife gave birth to a biracial baby girl. We're both white, so she was forced to admit that he wasn't mine. She confessed to having an affair last year, and that she was unsure of who the father was. The other day, we got the paternity test results back, which confirmed that the child was not mine. <br><br>I have two children (M & F, 8 & 5) with my wife, and I've contacted a lawyer to start divorce proceedings. I've explained the situation to my kids, and they understand that their mother and I will be living separately soon, and that they'll have to get used to living in two separate homes. I've told them that they'll still have a relationship with their sister, and that they'll always have a mother and father who loves them.<br><br>However, I am concerned about the inevitable awkwardness of their half-sister being evident proof of their mother's infidelity, which will hopefully be a secret from them for as long as possible. I've spoken with my wife about this issue, and she agrees that it's better that they don't know, but she also said that the new baby's skin color will inevitably draw questions from them, and that she doesn't know how to handle it without outright lying to them. I've suggested that she simply tell them that she was born that way, which may be enough to satisfy their curiosity for a while.<br><br>My concern is that the biracial appearance of our new baby will create an "us and her" mentality between my two children and their half-sister, and possibly even between my children and their mother. I can't think of a way of addressing this issue without revealing the embarrassing truth that the baby is the result of an affair.<br><br>I'm seeking advice on how I can mitigate this issue going forward, and prevent there being any resentment between the three children.