but.... it's a female manager... she's just touching her in condescending way, not in a sexual harassment manner. The manager is the supervisor of the store so firstly - just address this issue to her and if she's being combatant/threatening about it.... then step it up to her supervisor. I think it's called regional manager? or district manager?
Filing sexual harassment against employer/manager is not easy and it's difficult. It has to be substantiated with evidence. If there is no record of complaints or no pattern of complaints or no corroborating witnesses, then she's not going to win this. IronQueen will simply lose her job.
It sucks big time but that's how it works in USA. It's understandable to be this difficult because think about how many people would go to jail or fired if it's that easy to file a sexual harassment. In most cases - it's usually very trivial or overly sensitive like I touch you on the shoulder and you conceived it as sexual harassment. Or maybe I look at you from distance like a dirty old man because you're wearing a skirt and you may or may not have an imagination that I actually winked at you like a pervert.