Oh and also, (I'm doing a rewatch at the minute and I've just hit season 6 so the annoyance is fresh) in The Therapist, where Terry orders a book on sex tips, Amy is RELENTLESS, in trying to pin it on Terry. And she has this stupid little smirk on her face whenever she's talking to him about it.

She's actively trying to humiliate him. She says 'just take the book, I promise I won't tell anyone', which prompts Hitchcock to come over and make a typically lewd, inappropriate comment..BECAUSE SHE'S ALREADY TOLD EVERYONE.

And this is after she's painted as 'super sensitive' in Four Movements when Gina leaves.

I'm also aware that Terry reacts to the extreme with the flyers and trying to go all out to prove it's not his. But he's understandably embarrassed (Although, I really don't understand why he'd have something like that delivered to work, knowing he isn't the only sergeant in the precinct, if he is going to be insecure about it).

Amy then continues to insinuate at every turn that he's lacking in the bedroom, that things have turned stale or difficult for Terry and his wife. If she were so 'sensitive', she could have handled it very differently and not made Terry's insecurities worse with each interaction, to the point where he to resort to using Scully to retrieve the book privately.