The man is a complete man-whore. He can't keep it in his pants, Perrie is better off without him.
My guess is she will not dump him no matter what he is done. Sadly this will be another woman who loses her self respect and stands by her man no matter how many times he cheats on her.
I hope that Perrie has more respect and walks away but she may need Zayn for her career and the fact he is worth about 20 million pounds is an incentive to stay with him.