Trapped into her

Lauren, 55YO, just found a bodyswap spell into one of her grandmother's book. As she knew her old parent was gifted by some sort of power, she wanted to try it. Since her husband left her for a younger woman, she was alone. So, she thought it could be fun to enter someone else body.
To bodyswap, she just had to touch someone just after recitate a formula and her own body will become pure energy to possess the other one while the spirit of the possessed will be sleeping. The next page, she saw a reverse formula. So, Lauren thought it will be innocent if she took for a minute her son's girlfriend's body.

And it worked ! She really succeed to have control of the young and beautiful Suzanne. But she didn't want to stay too long. Lauren took her grandmother's book and red the reverse formula... and she had a shock as she saw that a part of formula was hidden under a coffee stain. Lauren tried to guess the three words but as her son came back at their home, she didn't made it.

"What can I do now ?"