I imagine Katie H is very pleased that the obnoxious, evil Perez has gone. He and Nadia targeted her from day one. Of course,
we all know now that Perez knew Nadia beforehand, but Katie didn't know that. Callum knew Cami, Katie P knew Perez, Callum, Kav, Patsy, Nadia and everyone but Katie H, in fact, most of them apart from Katie H knew at least one other in there. It must have been very hard for Katie H being an outsider. Then to be attacked about her relationship with a married man when many of the women in there have done worse, was downright nasty.
Katie H has fought Perez virtually on her own because of his evil behaviour. It must feel strange to finally see him go, to realise that yes, there are some decent people out here watching. I bet she's just trying to assimilate all that's happened. And perhaps just a little disgusted at the blatant hypocrisy of Keith and Katie P who sucked up to Perez.