You had a child with him somehow.

You had a child while being married with a heartless commander while being a heartless and taking in a human form

You were in shock since you thought he lost his reproductive organs but turned out he didn't and ended getting you pregnant. The thing is he said "We might have more children later on"

You were chasing your five year old child around in a game related at the way at the "End of the World" hearing the giggles and laughter from your child, you would soon get behind and your child went ahead.

Your husband, Ansem was standing on the ground staring at the black empty void in thought before he heard his child giggles and immediately noticed that his own child was about to fall in the void.

He called his dark guardian to quickly get his child to prevent the child from falling into the void, he would the tell his dark guardian to come back to him and give him his child

Once the child was in his arms, he got out of his deep thoughts and gently played with his child hearing the small little giggles fill the air

Meanwhile you would finally catch up, and stopped running when you saw your husband. His amber yellow eyes glanced at you before turning around.

He revealed your and his child, before speaking to you

Ansem:"Looking for our child, sweetheart?" He would ask