Eventually you will be able to put them back together but it can take a long time. Several months is common for my kids, and they will often still try when I put them back together. I think it took 4 months for one of my doelings before I could put her back with her mom, as long as she had been nursing on her mom! But now they live together fine.Yes you will have to separate and can't put them back together.
I disagree.The answer to that should be obvious. If she hasn't weaned her by now, she isn't going to.