Absolutely Anna isn't innocent at all. Those text messages, she is recieving and sending (like taking and sending pictures in lingerie as fapping material for some other guy [Chris]) definitively cross a line and she neither puts a real stop to it, nor is she honest about it in front of her husband. She also lets others grab her and doesn't say a single word to her "beloved" significant other about being molested, she stays silent or downplays it in front of him (like after the dinner with her fat boss, where David already got suspicious). Nevertheless Chris is a scumbag, so is Anna's boss, don't know about her co-worker, yet, but usually in this genre all males are total assholes anyway.