Maybe I’m missing something here, but why does everyone seem to think that Jasper is the abuser in this relationship? I mean, I know she’s smaller and cuter and she’s Steven’s friend and we’re meant to sympathize with her because of her tragic backstory, but let’s not forget what happened here. Jasper wanted to fuse so she could fight Garnet 2-on-2. Lapis was the one who decided to take that fusion, chain it up, drag their fusion into the ocean, and forcibly hold her down there for months on end.
Yes, Lapis has had quite a tragic past. Yes, she has been used and abused by other gems in the past, and really seems to need help recovering from that. However, Jasper didn’t put Lapis in the mirror. Jasper wasn’t sitting there using her in that mirror for millennia on end. At worst, Jasper captured and interrogated Lapis as she flew back to Homeworld. Even then, though, that wasn’t in the context of a relationship.
Jasper basically just got the shit beaten out of her for months on end, and the first thing she does once she’s free of the person who beat the shit out of her for months on end is immediately try to find this person and beg to be subjugated again.
Jasper is the one with Stockholm Syndrome. She needs to be kept as far away from Lapis as possible until she comes to her senses.