From what I can gleam from the picture she use to be the heroine of the kingdom but after "defeating" the demon king she settled down with said former king and started a family with him.

Close, but no cigar. The series for this is up on pixiv, but nobody's uploaded it here yet.

Her final attack on the Maou sent her to a parallel world, got married, and had a kid... Who is said Maou.

Paracite said:

Close, but no cigar. The series for this is up on pixiv, but nobody's uploaded it here yet.

Her final attack on the Maou sent her to a parallel world, got married, and had a kid... Who is said Maou.

I'll upload (aka DIBS).