So she had her own place to stay, I don't get why shes suddenly forced to live with mom and new family? It seems unreasonable that the mom was paying for her place, as her being broke and marrying the dad is the best excuse we have right now for why she slept with MC the day before they all moved in together, that if she literally only married the dad for money. If they claim she was always the one financing the daughters house on her own, then that excuse feels wrong. If she just liked immoral relationships like cheating, then she wouldn't even be (poorly) trying to hold back from sex with the MC, she would revel in that relationship.
Also seems weird the daughter could basically be out of her house, and expect to be in the family house so quickly while not even knowing where the family house would be, that being in another house alone would make the relationship unworkable (clearly he can get to the date places from the family house, and I'm pretty sure they haven't been back to her place). If she knew nothing, it should be "My family needs me, I'm being force to move at the end of the month. Depending on where I live, we might not be able to see each other, I'll let you know as I learn more"