M.P.
Just keep putting her back into the bed. If she cries, give her a few minutes, pick her up calm her, lay her back down.
Start on Thurs night. Tell your girls they will not get much sleep that night, or have them sleep on the living room floor. They will be tired Fri, but it is only one day. Try again Fri and Sat, by Sun night she should be sleeping just fine in her bed. Do not give in. It may take a couple of hours. She may wake in the night and cry again, do the same thing.
One thing that might help is put a heating pad on her bed to warm it and then remove it before you lay her down. Pat or jiggle her a little when you first lay her down and gradually decrease it.
Good luck.