Yeah just ask her nicely to please wash her feet or not take her shoes off.

Great idea

do you think she even confronted her about it? seems like a good starting point then this masterpiece idea

get one of the motion sensitive air fresheners and mount it on the floor so it sprays her feet everytime she walks by.

Or she might catch the hint that her feet smell

Some people are allergic to scents and fragrances and you might trigger their anaphylaxis...possibly someone who isn't woman who's feet smell. Best to ask or tell your boss...isn't their a dress code?

It would work though!.My neighbore used to come over every single day. He was helping me beat a video game. But his feet once smelt so bad, they stunk up my entire living room. I'm talking stench so bad I swear any plant he crossed shrivelled up and died. My dad yelled at him for stinking up the house (again). Dragged his ass to the front door. Told him he was banned from the house till he washed. OP, I suggest you should be a little more polite about it though. My neighbore never came back after that.

"Hey, could you please leave your shoes on at work? It's distracting." Don't have to mention the stinkiness unless necessary. Your coworker should take a hint.

Go giants

Some people can't smell body odor, it's better to talk to her about it on the likely chance she doesn't know before running to management like a coward and embarrassing people because you're a twat.

Either way the situation is going to be extremely embarrassing for her.