Was she already dating Wilson when Kutner asked her out or was this before the wilber thing started?

Oooo this always confuses me!

Ok, so, Kutner asked Amber out and she said that she was already seeing someone.
Then, Wilson told House that he and Amber had been dating for 4 months.
Then we discover that Wilson and Amber have only been together a few weeks, which means that when Kutner asked Amber out she either lied about being with someone else because she didn't wanna go out with Kutner OR she was actually with someone else whom we never met.

SO, I don't think she was with Wilson when Kutner asked her out. But that timeline always confuses me, so I am probably wrong!