Poor Sam. What begins as an incredible honour — the Queen wants to personally thank him for saving Ser Jorah's life! And give him a reward! Anything he wants! — quickly turns into the worst "thank you" visit ever, as Daenerys regrets to inform him that she's executed his father and brother for refusing to bend the knee.
While he didn't have a great relationship with his father and brother, this was still a horrible way to find out about their deaths, and our hearts broke for Sam, a character who deserves only good things in life. To add insult to injury, a weepy Sam actually thanks Dany for delivering the awful news, even though she never apologises.