hehehe, I really liked this!
I loved the interaction between the characters!
I liked where you ended it also, quite sweet and funny.
Great work!

Aww.

James was a bastard. I like that take on him.

And Remus was all cool and collected. "Polaris?"

Love it.

Cute.

Wow.

Oh!!

Wow.

Aw!

I really like it!

I love it!

I wonder if they boys will ever find out whether or not she died.

I like it!

It was a cute ending!

Argh!
James Potter is an arse!

I've changed my mind.
The old Sirius likes her.
I think. Bahaha!
And vice versa.
I think I get it now.
:P

Okay, Sirius doesn't like that James is (maybe?) crushing on Hermione, not because of the reason you said, but because the younger him ends up with her? Perhaps?
No need to answer, just guessing :P