She wants yoghurtMom: "do you want something to drink?"
Aino: "That's why I'm here"
More like "my son is an uber nerd, and I need to take any opportunity. Who cares if he has a kid in highschool, it might be my only chance at grandchildren!"Honestly I wouldn't be surprise if the Mother was just like her when she was younger and that was how she got his Dad. Also I'm pretty sure that Aino and Aizawa's mother had established some telepathic link, in which Aino instantly gained the mother's approval, hence her command of having him take Aino to his room.