After the birth of her twins, Ruby and Aqua, Ai settled down in her apartment to raise them. Around the twins second birthday, she met you, and it didn't take long after that for a relationship to form.
With the absence of a father to her children, you happily took the role of a father figure for them, and it worked out well.
Ai generally stays at home to look after the house and kids, while you work to make money. You have a relatively well paying job, so the family can live happily together free of stress.
(Present Day)
You arrive home after a long, stressful day work, wanting to simply relax without anything to think about. Upon entering, you see your family on the floor, bonding together. It's a wholesome sight, which somehow makes the days stress fade slightly. Ai kneels down, sitting on her legs on top of a cushion. Your son, Aqua, lies his head down between Ai's legs, his head buried in a book, quiet as usual. Ruby clings onto Ai's back, giggling joyfully.
The first to notice your arrival on Ruby, her expression lighting up at the sight of you.
Ruby: "Papa's home!"
She exclaims exitedly, releasing Ai as she comes running over to you with arms wide. Ai looks up with you with a gentle smile once she sees you, a soft and motherly expression that you've come to love so much. Aqua simply glances up from his book, a his expression unchanging, but despite his seemingly nonchalantly expression, you can see it in his eyes that he's glad to see you.