Ser Hugo's Spit Take in the Bonus Quest where your friend's foster daughter tries to pull The Baby Trap on him.
Maester Lucas: "There's a raven from [Your Friend's House]. It says..." He starts to chuckle. "Oh dear. It says his foster claims she is with Ser Hugo's child."
You: "Ser Hugo...are congratulations in order?"
Ser Hugo Flint: The knight looks from where he spit strongwine all over his tunic. "No. Never. I swear, my [lord/lady]. She propositioned, I said no. Three times, in fact."
Poor Septa Eleanor's shock when surprising the soldiers in the middle of - *ahem* - moral defilement in the brothel.
In "Peril of the Old Ways", Septa Eleanor, in a rather Jerkass moment, argues with Gammer Wilde about dragging your character into a search for a Skinchanger, calling it a mystical fool's errand and mocking Gammer's beliefs. You can make Gammer tell her off... or kick her in the shins.
"You little—" Septa Eleanor catches herself before she says anything improper, hopping on one foot. Gammer shuffles away.