Interesting Deja Vu moment with Nadia........for just as Janet didn't like Spider-man instinctively; so does the All-New Wasp finds herself not liking Peter Parker, not knowing or realizing that he's the Wall Crawler. :P
She doesn't like him because he's friends with Spidey... it's Spider-Man she really hates. Though that begs the question - why didn't this come up when she met Miles Morales?
Killed shortly after. The retcon is that she was pregnant when captured. Hank thought she'd been killed there and then, but the Russians let her go to term on her pregnancy, then took her out after whisking the baby away to the Red Room. Originally, Maria was simply already dead when Hank became Ant-Man. It appears that is no longer the case.
Janet and hank divorced back in the eighties but they did date on and off again after that. The last time they were a couple is post-dissembled when they went to England I think.
They'd been dating again before Disassembled, yeah. There was an issue devoted to them set in Vegas. However, Secret Invasion was being set up even then. A mysterious duplicate of Hank, using the Yellowjacket persona, grabbed the real Hank, who at the time was Goliath. Janet and the other Avengers thought he'd just swapped personas yet again. The issue of the duplicate wasn't resolved before Disassembled. In Secret Invasion, it turned out that everything Hank had done as Yellowjacket had actually been done by the Skrull. The Hank Janet dated that time wasn't the real one!