Thank her profusely and excuse yourself
From Lord Of Utterdom
"It was most appreciated," you say, standing as you quickly down the wine. You wipe at your mouth with the corner of your sleeve, and fetch four coins from your pouch. It would be enough for a peasant to live on for months, but it's a meager sum to you. You lay them on the table. "This is the least I can do for your hospitality. I am more grateful than you know."
She stares at the coins wide eyed, smiling slowly. As you exit the cottage, you can hear her squeal in delight. As you mount up to ride off, she swings open the door and thanks you again, waving like a madwoman.