What does it mean when she say's she is 420 friendly?

I avoid those types.  Not only that, but it could be law enforcement hoping to get additional charges on you.

on the few occasions where one thing led to another during a session and it was offered to me discreetly I sure as hell enjoyed it.

In Maine, with the legal use of medical marijuana, I've seen BP ads accepting it as partial payment from card holders.

means she will smoke pot.  It will probably up to you to provide it.  Personally, I'd stay away from a provider that advertised that. My preference.  From the ads where I have seen it advertised, it's usually young, BP ad providers.

I'm pretty sure that would end up in additional criminal charges regardless of the medical card.