My partner was being grabbed at a concert and didn’t tell me until we were leaving. what’s everyone’s opinions?

So my partner and I were at a concert and when we left she started telling me about how a guy next to her was grabbing her around the waist while I was grabbing drinks, she said she told him she has a partner and that she was pushing him away but when I came back she was next to him, didn’t say anything but I saw he was very close and pulled her in front of me, when she was telling me about it she treated it like it was a joke and her excuse for not telling me was she never got the chance because it was loud then she changed it to not knowing what I would do
My partner was being grabbed at a concert and didn’t tell me until we were leaving. what’s everyone’s opinions?
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