My cousin was in the same situation as Richie, her partner buggered off when their son was 6 month old, he shacked up with someone straight away and then went from women to women for a year or so, getting one of them pregnant. Once my cousin found a nice man he started hounding her with messages saying they should get back together, be a family again blah blah blah. She ended it with her new man (for the dream of fixing her family) and then he pied her off again once he knew she was single. She was alone again and all the while he was still with the pregnant women

I can imagine Robbo playing the same mind games