Welcome to Sr. What a tough situation you are in! Is there any way that if they do come for xmas that you can plan to take just your nephew for the day, and do some fun activities with him and your kids? Explain to your parents how you feel if they give you a hard time. You are, after all an adult and have your own family to look out for. Check out our other groups for friends and family, but keep us posted. Best of luck to you!