You mean glasses mugo or jerk mugo?
Glasses
I think he's summoned with pastries and other sweets, but mc hasn't been baking recently so he's not coming out and/or Jerk Mugo doesn't want him around, suppressing him maybe, and he's being the dominant personality.
I thought one of the chapters explained that glasses Mugo doesn’t actually like the uke.
Not romantically, in the house or even as a sacrifice, he wanted the bottom to live a normal life, but he's not indifferent towards him, even if that's what it looks like, otherwise he wouldn't have put that protective spell on him aka given him another chance of life. But Glasses Mugo is just so dedicated to his role as a 'God' to that family and we know little about him or the other ones so who knows what could happen.
Got it, got it. Guess that’s my cue for a reread :-)
I'm always wondering why lord mugo never seems to come out on his own... I want to see him and uke fuck too..