The thief that got away

I have a woman that comes to my house that has a bone disease that affects her brain to.I took her over on the weekend to give her sister a break because she so difficult to be around.She can get out of hand times she wanted to come this weekend so i said yes she came over and her sister was after telling me she stole a purse out of  Walmart that cost 18 dollars . the next day after she was there i told her that Walmart was on the news looking for a purse that had circles on it and it looks like the one you have she said i payed for mine lol i sad you better show them the reciept well she told me to go bla bla myself lol then my friend came over for supper on Saturday and she is kinda of a big eater we had spaghetti and meatballs the one with the purse was in her face saying you going to eat all that she kept repeating it well the i was so embarrssed but what can you do any ways to sum it all up the thief got away with the purse.