Guest at my husband's job is obsessed with my husband.... He swears there is nothing going on

My husband and I have been married a couple years. He's a very good looking guy even if he doesn't think so. He is the sweetest person ever. My husband works as a server at an Olive Garden and obviously it's normal for some guest to have a server they prefer. There's a women however who is beyond obsessed with my husband and always demands he be her server. She is about his age to so it's not some old lady. She gave my husband a new video game around Christmas because she heard him talking to his co-workers about it. My husband felt weird about it and accepted it but gave it to his younger brother. My husband has been a server at Olive Garden for 3 years and pretty much worked the exact same schedule. A double shift Wednesday-Sunday. On some occasions he may only work a lunch or dinner shift depending on business but it's always Wednesday-Sunday. She's there at least 3x a week demanding he serve her and she tips him like $100. When I was there with our baby for lunch and she demanded him I finally saw h t and she's gorgeous. She said "Oh.... Is that your sister?" He said "Nope. My wife and my little buddy here!" She gave me the stankiest look." And while he was trying to serve me she kept asking for things. My husband called in yesterday because I have been sick and he stayed to take care of the baby and his co-worker texted him that his little A-list guest came in and lost his shit because he wasn't there and she knows his schedule and should have been there. My husband just said "What the fuck?" And he said that when they explained he's home with his sick wife she said he's not sick so he should be here and that ok a big girl and should take care of myself! They said she was yelling so loud and my husband asked if they banned her and he said "You know George don't ban people here. The guy that keeps trying to solicit the female servers for prostitution still keeps coming in." I asked my husband about this because I read the text and he rolled his eyes and said "My co-workers sadly had to deal with a Karen because of me not being there." I asked why is she so obsessed with him. I mean I women usually wouldn't get so attacked unless a man showed some type of interest. My husband swears he has no interest in her once so ever. I'm just really upset and don't understand why she won't back off!