Read the article, apparently works across all clothing.
I think we need more info tbh. Everyone is jumping to the worst conclusion.
Maybe the employee was restocking in that section, could hear mother and daughter were struggling to find what they were looking for and made a genuine offer of help to find the right section / product, and the mother has taken offence.
Or maybe the employee was lurking around lingerie when they didn't need to be there, followed them to the changing room having seen them pick up bras and made a pervy comment.
I think there's a big, big difference.