I think you know in your heart that she is not right for you. Gabbysmom's point about custody was right on.
I always advise my daughter not to make plans too far ahead in a new R. The hockey game is more than a month off which keeps you hooked & with her son? No one wants to disappoint a kid. But you shouldn't even be meeting him yet. & why do you need to tell your ex? I never toldine about Josh -y dating life was none of his business.
This woman seems a bit in a hurry to make her presence known despite the fact there is little substance in the R. As Wii says - Red Flags abound.
Sorry to here about the work situation. How you pay for it (student loan or whatever) is none of ex's business either.
Education is never wasted & am in vestment in your future is a good one
Best wishes with all your decisions
Barb