This Nader storyline has picked up steam since the police report arc, but I'm going to go out on a limb and say I don't think he's that fucking dumb (heh, he might actually be) to let her back around.
First of all, since his arrest, he hasn't answered any of her calls and he hasn't discussed her on any live streams that we know of. Before Chantal got the police involved, he would entertain her incessant phone calls and even live stream them to show her madness to the world. He would also let her in at the expense of her dignity and wallet.
Secondly, I don't think D² being gone will be the catalyst for him suddenly entertaining her. Remember, he used to entertain her constant calls right in front of D², and if that's what he wanted to do, he wouldn't have had to wait until D² was gone. Remember what happened around Christmas when D² was awkwardly eating her food in silence as Nader went back and forth with Chantal on the phone?
Lastly, the cops are now involved and Nader actually has more to lose this time around. He's making his own YouTube money, has an audience, presumably a new cash cow in D², and was able to go grocery shopping on his own recently without the Gunt. I don't see any reason to allow the slob back in.
There is a possibility he may take her back, only because they're both extremely dysfunctional, but I'm not banking on it this time.
Though this arc has been boring and predictable, the police report added a little razzle dazzle and Nader better keep his end of the bargain up if he knows what's good for him.
ETA: She's a creepy fat bitch and her obsession with getting in his home is incomprehensible. Like, fine, you want to get inside. And then fucking what? What next? What an ugly weirdo.