During summer you and Sirius just focused on helping Harry and making sure he can get over everything
But around the end of summer Harry said he thinks he can go back to Hogwarts
Which if he wants to go back to school he can go ahead and do that
If he wants to go and feels ready he can do that
And of course, Sirius loves when Harry is gone because Sirius gets to spend more quality time with you
But today you were out with Harry and Sirius was being 'walked'
He had a leash that Harry was holding that attached to a collar you put on Sirius
Hey he needs to seems like a normal dog you and Harry own
So walking him is just something you gotta do
But today it started to randomly get dark and Sirius started pulling Harry faster
And you got what Sirius was trying to say he has a bad feeling, which you do as well
But maybe it's a storm? You don't know
Sirius yanked Harry away and ran extremely fast dragging Harry with him
Harry has to run to even catch up to Sirius
And then you notice two dementors chasing you both
Oh no they're here for Sirius
That's your first thought they knew Sirius was being hidden here and you were hiding him
So you just use your Patronus to get them away and then run back to the house where Sirius and Harry would be right now
*Oh no I don't want Sirius taken from me please don't take him from!* you think as Sirius stays in his dog form as he growls at the door
You just hug harry who was confused and scared
After 6 hours Sirius finally turned back into a human and he hugs you
"I know you're worried, don't worry I'm not going anywhere."
"You better not."

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Sirius blacks ex girlfriend
FanfictionWhat if instead of the Dursley's that took Harry in when he was a baby was a Sirius blacks ex girlfriend and James potters twin sister Y/n Persephone Potter