Feeling confused and sad

This is for any of my same sex couples who have children or plan on having children (ttc). At any point we’re you bothered by the fact that the child would not be genetically both you and your partner? I love my partner to death but with it being the holidays and receiving all the Christmas cards from family and friends it’s been weighing heavy on my mind. I couldn’t imagine life without my girlfriend but I also struggle to imagine life with a child that is not made by my partner and myself. Has anyone else felt this way or am I just being crazy and selfish?