How do I explain to my 9 year old daughter that Grammy is an embezzler, a liar, and is divorcing Grandpa?

Grammy just got busted by the FBI for embezzlement for $160,000.00 that's admitted. Now she wants a divorce from Grandpa, but still wants to be with him {so she can make him pay the 160k back}. Grammy is an animal lover, talks to all the neighbors, and is very family oriented. Turns out, she's a liar, a thief, and a manipulator. I personally never liked her, or trusted her, and it was mutual. Call it mother-in-law syndrome, but I had a gut feeling. It also turns out, she had a life insurance policy on Gramps he didn't know about, wanted to buy a house in Florida, and had her illegit daughter on the payroll of the company in Michigan while the daughter was in Florida. And for the past 2 months, Gramps was getting pressure to put Gramma's name on EVERYTHING Gramps had his name on. Gramma is obviously evil, but now I need to tell my daughter something.