I've been with my partner 3 years, we live apart with our respective kids and so have a relatively complicated relationship of seeing each other between work/kids etc.
He's always mentioned his ex (mother of kids) a fair amount but not generally about the kids. For example he'll say 'ex says there's a great new TV programme....' or 'ex asked me to help her with her banking' etc. It may seem insignificant, but this is a very regular occurance (most times I see him she will get a mention, I know a LOT about her!). They have been divorced several years but he's also mentioned in the past that 'she asked if I'd like to try again'. Which seems a very inappropriate thing to tell a current partner.
My reaction to all this varies from ignoring to casually agreeing to occasionally questioning 'well do you want to be with her then, I dont want you to feel obliged to be with me'.
I don't really see the point of his behaviour other than to try to make me jealous/compete. However, its making what would otherwise be a good relationship between us a bit strained at times. Any thoughts on how to improve this? Is it likely insecurity on his side? I hardly mention my exhusband at all, yet we have kids too.