She accepted the drink he was offering her, without protesting. Much.
"Hey! I should be the one paying. After all, I wa sthe one inviting you.According to muggle, that is a straight clue on who pays the drinks." she replied immediately, drink a sip of her drink right after speaking.
"Awesome as usually." she paused to taste the butterbeer on her mouth. "Why don't we make a toast?"