Just a work story

So i had this lady come into AE and she picked out some mens jeans, and well I didn't say anything assuming that's just the jean style she liked because some women like mens jeans and also we arn't suppose to tell the customer what style or gender jean they should buy..you know what i mean? ...anywho...i spend a half hour in the fitting rooms helping her with the jeans then she's like these are womens jeans right? i'm like no...and she has a fit. It's not like i could do anything...so i help her with womens jeans...she gets annoyed with me even though i was being super nice and helpful. She has another co-worker help her who is my manager....later i go up to my manager and explain what happened, and she's like " it's not your fault at all" she was so nice about it. I was afraid i was gonna get yelled at.