Does terribly behaved flower girl HAVE to attend the bridal shower?

Does the flower girl always have to attend the bridal shower? I ask because I'm hosting a shower for the bride and she has made it known to me how poorly behaved her flower girl is (she's almost 4 and I've witnessed the bad behavior myself). The problem is the girls mother (who is the brides FSIL and a BM) doesn't watch or reprimand her when she does something wrong (breaking expensive items in someones home, smashing chocolate into the rug at a reception, running around unsupervised at night in a huge backyard). I've also been to multiple showers or events where she literally cries, whines, or screams the whole time because she wants cake or doesn't like the food, or whatever. And the mom just sits there and doesn't even remove her or try to calm her down! Someone was trying to give a toast and the little girl was cry/screaming, and it was like the mom was totally clueless. I know this behavior is irritating to the bride, so is it okay to host an adult only bridal shower? Cont. in com