Exes are they cool or no?

So is it ok for your current girlfriend who doesn't work to run off to her ex boyfriends house thst cheated on her with prostitutes ( he videotaped and girlfriend found hidden camera) she says she will never touch him again but goes n spends the night at his shop n claims she's working n she refuses to answer calls when she's there! ? Would you jet your S/O hang out with exes?
Exes are they cool or no?
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