I guess Ink and Blue are an ok ship, but then again your choice
But whenever someone is talking about Errink, PJ(Paperjam) is brought into the conversation somehow.
But it's debated if he's actually their kid or not. It's cannon that they're created by their magic(reamnents of fights), but it hasn't been confirmed if he actually IS his own AU or their kid.
Even if he was, Error would hate him and would probably attempt to kill him.
That's besides the point
You ship what you want to ship.
Unless it's incest or pedophila.