A few weeks ago, DH's ex told him she wanted PR for her new b/f. I say new, as this is the first time DH has heard about him, but they may have been going out for ages.
Anyway, we've been looking into the legal side and it doesn't look like there is much chance of it - they aren't living together, for a start - but we are currently enjoying a pretty conflict-free settled time and DH is keen not to give her any reason to be difficult. He's thinking about whether it might be something he can live with in the future. I think it is a really bad idea, myself - anyone had any experience of anything like this?