How weird would it have been if Noel used "confess" on Tania and she said "I love you" instead of confessing the crime.
Shows how much she's changed from the person that Walter was describing.
She confided with handsome boy, they got close, hooked up: Fine. Gotta move on eventually.
She stood by him when he was gambling their funds: Not great, but love is love I guess.
She JUMPED IN on the embezzlement and gambling because her boyfriend sucks at it, and kept using Walter's feelings for her at the end: need I say more? She's fallen so far from "I love him but he doesn't need a lover".