Did Wilson cheat on all three of his ex-wives or just on two of them? :)

It has never been specified.

On the episode "Spin", Wilson sinabi to Cameron "I always told THEM (my wives)" speaking about the cheating, therefore I'm thinking he cheated on madami than one of his wives.

We know his third wife cheated on him, but did he cheat on her? I don't think so.
Wilson sinabi to House that he wasn't cheating on her on the episode "Sex Kills", and yes, I realize that Wilson could have easily been lying, but I can't imagine House not finding out about it eventually or this not being shown/hinted to us (the viewers) at some point if it had actually happened.


So my conclussion is that Wilson cheated on his two first wives and the third one cheated on him. Karma is a bitch, Wilson x)