This is when you have to realize..............You have to live your life for you!!!!!!!!!!! Your gonna be a dad now, live your life for your kid. If your bro and sis don't agree, that's cool everyone has their own opinion and the truth hurts. But they will get over it because your baby is here to stay. They should have asked you thoes questions when you first started having sex if they were so concerned. Just do you, you have other things to worry about right now. Trust me. :-)