They should be left behind

Sage is a young woman who has always lived in the shadow of her perfect older sister, Anabelle. Although always painted as the inferior sister, she paid it no mind because the less attention she got, the more freedom she had to do what she wants. Obviously the favouritism is very annoying at times and embarrassingly blatant even to strangers - but in general she is just used to it.
...

The problem is when Sage got drunk and had a one night stand that ended up leaving her pregnant. Just as Sage gets used to the idea after a small amount of shock, her parents and sister finally come to know about her pregnancy and their attitude is just... something else. They demand Sage to give her sister her baby because she apparently "deserves it more than you do" and "she's your older sister". Sage is appalled, and though the fact is that her sister is infertile means her and her husband are struggling to have kids, this gives them no right to be literal kidnappers.

Sage has had enough, and although she gives them chance after chance they continue to disappoint her, slowly strengthening her resolve to leave this toxicity behind once and for all. Throw a cute baby daddy in the mix and Sage is in for a wild and rocky ride through these times

So the big question is.... Should Sage finally leave everything behind once and for all?