He changed~

Error became a mother to Pj and is carrying a new baby (gradient)he randomly became pregnant in the anti-void , blue lead him to an abandoned house in the woods of underswap ,

Error and his child go to outertale on the weekends to star gaze (got that from error) Pj is 5 and gradient doesn't have an age , when this starts error is about 8 months in him pregnancy with gradient . Mama Error is worried if an Au sans sees him with the kids they'll think he stole them and give them to ink of foster so thats why he's welcome in underswap as he returned blue safe and sound and also helped build part of the city with his strings, but if anyone gets asked by sanses 'have you seen error?' They have to say 'No' .