I have been separated for quite a while now, and for the last seven months I have been dating a really lovely man. We are both sure that this is a long-term relationship, and things are going really well. We both have children from our marriages, and have recently introduced the children to each other and us as friends. However, his daughter has worked out that we're actually having a relationship (and she told her brother so his children both know). They were both absolutely great about it, so no worries there.
So now I have to tell my children (because I'd rather that they found out from me rather than his children next time we see them), and I'm not 100% sure of the words to use. My partners children are now living 50% of the time with their mum and the man that she had an affair with (and therefore more used to a parent having another relationship), but as far as I know my ex isn't in another relationship.
My children are 11 and 13, so I just wondered if anyone had any advice on how to tell them that we are actually more than friends?