Raising Hell (and a Baby)

Harry Potter thought post-war life would be boring.

Instead, he ends up a single dad hiding out in Grimmauld Place, armed with nothing but a baby, some bad coping skills, and a truly cursed house.
When Teddy's accidental magic flings them both back to 1979, Harry has questions. Like:

How does one babysit a shapeshifting toddler in the 70s?

And importantly - is it illegal to kill a soon to be dead Death Eater before they canonically die?
(Asking for a friend.)

Time is broken. Harry's patience is broken. Teddy's diapers are also probably broken.
This can only end well.

_____

Also available on AO3 under the same username. Please don't repost without permission