I have the most amazing 6 year old daughter and I am in the process of getting divorced from her father as I discovered he has been living a double life, not only that but he has another child with someone (although there is at least one other woman he has also been seeing I'm aware of!). Finding out this has been heartbreaking although it explains his behaviour over the last few years (things were so bad I had already filed for divorce but he refused saying everything was fine!). My daughter is adjusting well to the situation and he finally moved out but sees her regularly. He says 'our' daughter is priority as this other child wasn't planned which I find appalling! I cannot deny the fact my daughter has a sister and now I need to know how best to tell her this? My husband has contact with his other daughter (I'm not sure if he's still with her mother as she wasn't happy when I sent her photos from the private investigator showing him with another woman!) it's amazing how you can be with someone so long and then suddenly see them for what they are. He is a controlling manipulative liar and ultimately I am happy to be rid of him however for our daughters sake I am keeping things civil and he has access. It's just how to go about the next stage of explaining to her she has a sister! I've messaged the mother of the child and we've agreed we would like them to know each other (both are only children as far as they know) I was advised that her dad needed to tell her but I disagree, as her mam who has always been the one to put her to bed and get her ready and look after her the majority of the time and who she trusts and talks to about anything and everything I either want to be he one to tell her or at least be there when he does. What is the best way to talk to her about this? The other child is 2 and it turns out she met her last year although he didn't tell her who the child was (I find this appalling that this woman who I knew nothing about has met my daughter) Sorry for the long post, any advice would be appreciated.