I have a 2yo DD who hasn't seen her bio dad since she was 6mo (his choice, I don't even know where he lives as he is avoiding CSA). My new man has recently spoken to me about the possibility of her dad showing up in the future wanting to see her, and how this could effect our family unit. He is also concerned that if we have more kids, my current DD may feel odd being only half related to our other kids.
These are all things I have considered but have no idea where to get guidance and practical advice (other than on here obvs!) and seeing as he seems genuinely worried I thought it would be good to get some books on the topic. Any recommendations? TIA!