It's just a casual, relaxing morning, and Penny enjoys a cup of coffee. But her mother-in-law is coming to visit, so that relaxation likely won't last.
Sheldon probably has a lot of advice for Raj when it comes to living with Leonard and Penny. He'll probably also encourage him to sign a roommate agreement.
Something else that could be posing a problem for Sheldon is that with Raj taking his old room, it makes it that much more permanent that he lives with Amy now.
Sheldon: Well, I think it's very nice that you're helping out our friend. Leonard: I think it's nice that you're taking whatever medication Amy is clearly giving you.