Gzel entirely knew her purpose and why Monica called her all of a sudden. She knows what's going on because Deth told her head-on that they're having difficulties with their relationship.
Deth came to her for advice and he asked her if there is anything she can say about his what-ifs.
She's happy because it felt like her son is consulting and confiding in her, like his mother. Although they are mother and son, she couldn't say it to him. So she just does her role secretly and she's very happy about it.
Even though Deth doesn't know what's their real relationship with each other, she's happy to know that she was the one he will run into and confide with.
She's happy to think that they are getting close to each other. They are starting to build a relationship that will be advantageous to
