i think only you know what is right for you and your baby, however i did want to say that you shouldn't feel down about your baby not having a father. Many chldren are raised in a single parent family and turn out well adjusted and ready for life, and i am sure there are many children who are raised in two parent families that turn out far worse. It sounds to me like you have a very supportive family and your father will be there for your baby. Who knows what the future may hold for you, you may find a loving partner who will be happy to take on the responsiblity of fathering your child, remember, being a sperm donor does not make you a father. Good luck sorting out things, maybe it is something that can be left until after baby arrives and when your hormones have settled down and you can think things through.