Ok, one of my old primary school friends has a boyfriend, then his dad met her mum and they got along. Then my friend catches her mum in bed with her bf's dad, and it was a bit of a shock. Now her mum is telling her to break up with her bf, because her mum wants to date his dad. It just doesn't seem fair to her, because they were together first and they were together for over a year. and they are perfect for eachother. Any advice for her?