Her son is 10 - she split with his dad when he was just 18 months old & has had numerous relationships subsequently. In the past 5 years she's had 4 "serious" relationships - one of which was an engagement that only ended a year ago. Her most recent relationship is with a guy who lives in France so she takes her son over there every month & this guy & his daughter join her & her son every holiday they have. She's just come back from a month in France & calmly told me that her DS was "acting up" & "giving her back chat" all the time so she told him he was no longer welcome there & put him on a flight home to his dad in London. I feel sick for her son as I think that he must feel vulnerable that he'll a)lose his mum &/or b)be uprooted from home & moved to France. We went out last night & she asked me what I thought so I told her (in what I truly think was a measured & non-judgemental way) that I'm worried about her boy & tried to point out that he's maybe not just being a pain in the arse but is feeling upset & trying to get her attention. She bust into tears, refused to discuss it further & I've texted her today to ask how she is & she'd not responded. Where do we go from here?! What should I do?!