My girlfriend gave another girl a hickey as a dare?

Anonymous
So I'm going to keep this fairly brief since it's not something I'd like to alongate.

My girlfriend was out for a thing called "Dare Night" and essentially it's a bunch of groups of 5 that are given a paper with dares on them, for example. "Take a shot of tequila" or "Run naked through walmart"

One of the dares was "Give someone a hickey" and my girlfriend did this one to another girl in her group. Would this be considered cheating?

I've never had any other signs of her cheating on me or proving to be disloyal, aside from my own personal paranoia.

This is my first time using this site, so I'm unsure of how fast the answers are on this but hopefully within 24 hours would be nice! I just don't want to wait any longer than I should to make a decision.
My girlfriend gave another girl a hickey as a dare?
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