Bit of background. Relationships with DP's ex have never been good and we have generally managed this by keeping contact to a minimum, being fairly rigid with contact, all the usual tactics for dealing with tricky exes. Now she has joined FB and asked to be friends with DP. DP just ignored it but then one of the kids asked him about it. Alarm bells started ringing. Are we being paranoid? Has anyone else had to deal with this situation (and I don't mean people who do have good relationships with the ex).