I don't watch Jojo. Sorry.

The punchline is that Josuke punches his mom and heals her.

Oh, I see. Wait, I don't. Oh well.

No? oh well.

Like what nightingale said she'll heal Gudao even if she will have to kill him first.

That's what I don't understand. Maybe it's the stand? Oh well.

You get the idea right?

Roughly.

Close enough.