The whole Charming family has been nice to her considering what she has done. Prince Charming lets her stay with Henry and watch over him. He has not once tried to rally the town against her–it wouldn’t work, though 🙂 But he has not spoken a harsh word to and of her.
Emma said thank you numerous times in the episode and was very sincere about it. She acted almost kind to Regina, understanding that Regina put in a lot of effort to help her and Snow White. And Henry was sweet to Regina, hugging her and believing in her.
Snow White didn’t do much, but in the previous episode, from the sound of it, she may be capable of forgiveness or tolerance.
And I don’t get why they have to invite Mr. Gold, either. Seeing as how he was willing to kill them off, they don’t owe him much. Both he and Emma seem to know that.