I wish we had the choice to tell Melissa all about the trouble Erynn is in with Ethan. I know Erynn wants to keep it all a secret, but her problems became our problems as soon as Ethan and his cronies jumped us in the alley. It makes no sense to follow Erynn on this because her strategy has completely failed and things are only getting worse over time.
Melissa is much more than just a neighbour to us. She helped raise us back when our mother was a fall-down drunk after blowing up her marriage by secretly meeting up with her ex. So we owe her a lot, and it's really awful for us to be lying to her as we are now. It's ridiculous that we trust John with everything before her. We have a history with Melissa that makes going to her a reasonable choice, while John just stumbles across us by random chance and then we choose to make a ludicrous plan with him? That's just poor writing.
Telling everything to Melissa also comes with the benefit of having more scenes with Melissa, which is a win in of itself.