I just found out I'm expecting my first grandchild. I'm a little concerned about the genetics in this.

I'm not sure if I should be talking about this or not, but I need to tell someone. My daughter is 18 and is expecting her first child. She doesn't know I'm making this post. I just need to get this off my chest.<br><br>Her boyfriend has a half sister who has a half brother, making them biological half siblings. They got together a few years ago. I had no idea and now I'm dealing with the consequences. I'm worried about the grandchild's health.<br><br>My daughter is ecstatic, but I'm still processing. I'm a little disappointed in her boyfriend's family for not telling us. I'm just glad to have grandkids coming soon.