no but its the law check it out
what reason was articulated for refusal of service?
https://www.mydoorsign.com/blog/right-to-refuse-service-to-anyone/
So who can businesses refuse service to?
These signs also dont allow business owners to refuse service based on arbitrary reasons outside of the protected classes (though pointing out signs to cries of No fair! might avoid any further action on the part of spurned patrons). Instead, reasons must be legitimate enough to hold up in court. In general, refusal of service is justified in cases where a customers presence interferes with the safety and well-being of other patrons and the establishment itself. The most basic examples of this include patrons who are unreasonably rowdy, patrons lacking adequate hygiene, and those accompanied by large groups of non-customers.
As owner, she should have the right of not having to serve anyone... no one is forced to eat there either... it isnt good business sense, but it should be her right.