I see what Sandi2 is saying. The simple point is that desire was always there. She did not just find it. She may have been scared of it, she may not have understood it, she may have suppressed it.
It was always there. She just as Lan is.. is learning about herself and who she really is. Who she wants to be. Sucks that she had to learn it this way. She likely won't be able to explain it. Or it won't make any sense.
The less time Lan spends trying to figure it out the better off he will be.
Kind of like I kept telling him. She will come to you. Look what she did. I am telling you now. This other stuff will come to you too. You just gotta ride it out. Keep showing her what she is liking. She will get to the point she will just want to tell you everything. By that point if you keep this up you won't really care why. Cause in the scheme of things it does not mean anything.
She cheated on you. Again, SO WHAT. You knowing why is not going to change the fact she did it. You can't change it, She can never take it back. Just like you can't take back all the stuff you did. Go ahead and tell me what she did was worse. You got hurt more. I dare ya.
Don't dwell in it. Just yet. Enjoy the ride. I am telling you again. The ride will bring you right back where it started from. Always does, Always will.
Relax Eat Think Act normal React.. Smartly. Do something different. Emulate. Do Work.