I left a violent spouse, who was the biological father, while I was seriously ill. (Diagnosed with a very serious illness pretty much the same time.) It was very difficult financially, practically, emotionally...understatement, but so you guys now have more context as to some of my feelings about JS and SS relationship.
For me? You do what is right for your kids, period.
JS has a job. She has the condo. She has a large extended family who seem supportive. SS was not MS bio dad, threatening to take her away from JS. SS wasn't working. He had no assets, according to his paperwork. If anything, he was dependent on JS.
SS is NOT someone I would want around my children. Huge red flags with his preferences, his lifestyle, his friends, his lack of stability, even if she knew nothing about his sexual deviance, which again, I find very hard to believe.
So, I am left with the ugly likelihood JS knew what SS liked, and she accepted it....and maybe liked that sort of thing herself. No one wants to think this, especially not another mom. But JS so far has not done anything to give me reasons to support her. She gives conflicting statements to LE, she acts incredibly flat and weird when talking about her missing daughter, the consoling of SS during the interviews, she remained friends on social media with SS AFTER he was arrested and changed her Facebook name to that of their dog so she was clearly still active, she has never issued any statement about MS since her death....
From what we also know, JS was working from home. So she was spending plenty of time around SS. I can't imagine he was able to hide who he really was from her. It just does not add up.