She's batsh*t crazy because she feels as if Wade used her. I mean, she did beg her parents to take him in when he was essentially homeless, they raised him through the end of high school, helped him get settled at Marquette and she found out he was cheating on her in year two or three of him being in the league. She gave up a lot for him and Wade left her once he got "big". So it made her look like a fool. From what I've heard, her family at one point was ready to disown her because of them providing for him.
But keep thinking Wade is a perfect little soldier.