A bit of an older one, but a pretty infamous one: Avengers #200. For those unfamiliar, Immortus' son Marcus takes Carol Danvers to Limbo, impregnates her, erases her memory, then sends her back to reality. Oh, and he uses mind control to get her to fuck him.. Bear in mind, she has no memory of any of this and therefore has no idea why she's suddenly pregnant, a fact made even stranger when she gives birth a couple days later. To Marcus. During this whole thing, the Avengers are congratulating her on her pregnancy and her new child, in spite of the fact that she doesn't understand why any of this is happening and clearly isn't happy about it.
Then Marcus grows to a full grown adult in a very short period of time and Carol decides to take off with him to parts unknown with a very clearly romantic/sexual element to this pairing.
So, we've got mind-control rape, quasi-incest, and the Avengers sitting idly by while one of their own takes off with a guy that, at no point, seems remotely trustworthy.
Ignoring any of the feminist critique of the issue as being misogynist or whatever, the story's still pretty awful. The fact that one of their team shows up mysteriously pregnant in a manner that's biologically impossible is seen as a cause for celebration, when it should rightly be seen by them as a cause for alarm. Marcus telling Carol that he wooed her in Limbo with his charm and mind control machines, without any suggestion in the story that maybe that's a little inappropriate; in fact, the story seems to almost suggest their tryst was romantic, even while explicitly mentioning that mind control machines were involved. The Avengers basically just going "welp, what you gonna do?" when Carol and Marcus take off. Everyone's just so out-of-character throughout the story, and the story itself is pretty dumb.
