I don't remember if Remy was working the Toronto series that week or not; if so, he was on the road when the first assault occurred and might not have found about it until Phoebe and Jenn had already spoken. But even if we're safe in assuming that the Remys spoke before Phoebe spoke to Jenn, we don't know how that conversation went. Any of at least three scenarios are possible:
1) Phoebe and Jerry agreed that they should try to talk Jenn out of proceeding against Jared in court.
2) It was Jerry's idea and he pressured Phoebe into it against her better judgment.
3) It was Phoebe's idea, Jerry tried to talk her out of it, and she did it anyway.
None of these options seems even slightly implausible on its face, and I'm unaware of any reported evidence making one more likely than the other. The only thing we know, if media accounts can be trusted, is that it was Phoebe who actually made the request and the promise.
Perhaps I'm more willing to believe that Phoebe might have made the decision on her own because I assume that, as the wife of a man who spends large portions of every year on the road, she would have been used to handling her kids' problems on her own. Also because of this, which Martel's mother said to reporters
when the story first broke: "Every time Jennifer had problems she would call them." Given Jerry Remy's lifestyle, it seems likely that "them" most often meant Phoebe. It's not even clear, if you read that Globe story, who initiated the conversation in which Phoebe asked Martel not to press charges.
In short, there are a lot of different possible storylines here, in some of which Jerry Remy is highly culpable, in others, not so much.
Sure it does. It makes scenario 2 above entirely plausible. But it doesn't thereby render scenario 3 implausible.
You can't "expunge" somebody else's feeling of moral responsibility. I have no doubt Remy feels that responsibility, and he has said so. Any parent in that situation would, if they weren't a sociopath. How responsible he really is, in light of the facts, is a different question entirely, and one that we don't know enough to answer.