"want to all move in then realistically where can the relationship go? "
It slows down.
I totally agree with "Thegreat", she is jumping ahead and considering they have four children between them, planning a baby yet, without having lived together, is ridiculous, they sound like teenagers.
They need to get to know each other, as full partners, each other's children and all of them will need an adjustment period, before she even becomes pregnant.
They both know that relationships don't always last, are not always happy and a baby adds complications.
So why not just enjoy themselves and their new blended family, to start with?
The fact that she has been in an abusive relationship, but is behaving so rashly, isn't a good sign, tbh.