Ah, why is she somewhat not surprised to see her out and about like this? And very obviously intoxicated at that? Normally she would have made herself the mom in the situation, but you know what? Who is here to actually tell her no? To tell her that she's being an embarrassment and can't act like that?

Tobirama? It's better to ask forgiveness than permission.

"I already had a glass, but you seem to be having quite a bit more fun than I am." This is going to end poorly for everyone involved.