For some people dating an ex is totally off-limits - have you never heard of the girl code?
However the reality is that one person cannot own another person. Whether we like it or not, our exes are not our property and neither are our friends and saying that a person is off-limits forever after dating them does not work out in reality.
Nevertheless, hooking up with your friend's ex right after they've broken up is perhaps not the best way forward, so Jo's best advice to anyone who has feelings for their friend's ex is to be prepared.
"You need to be aware that however or for whatever reason your friend and her partner broke up, your relationship with her will change irrevocably from that point.
The big question that you need to ask yourself is whether he is really worth that massive change."
If you think the other person is worth it then be ready for what comes next...