Dp and I have been talking about marriage. I have a daughter from a previous marriage and when we divorced I changed my surname to her middle name (which works) so we still have a name in common. Dp and I have a child together who has both of our current surnames, with mine as a second middle name. I am a teacher so my surname is important in my opinion as obviously I'll be called by it often. I prefer my current surname and don't want to change, even if it means having different surnames from both of my children. Dp thinks it's because his ex has kept his surname which is also partly a reason but AIBU to choose to have a different surname to both my children and dp?