I think she felt relaxed telling Derek her monoluge in "Freedom" beause she realized he still loved her and vice versa.
Derek: Meredith....
Meredith: Stupid, corny, idiotic, I can't believe I did this. Stupid, loser, son of a ... I could be at home instead of ... oh
Derek: Meredith....
Meredith: Where have you been?! I've been waiting and waiting for you! And I did this stupid, embarrassing, humiliating, corny thing. And I was just gonna tell you that, this over here is our kitchen and this is our living room, and over there that's the room our kids could play. I had this whole thing about I was gonna build us a house, but I don't build houses because I'm a surgeon. And now I'm here feeling like a lame ass loser. I got all whole and healed and you don't show up. And now it's all ruined because you took so long to come home! And I couldn't even find that bottle of champagne ... (Derek holds up the bottle and smiles)
Derek: It's the kitchen? Living room - a little small. The view's much better from here. And that's where the kids are going to play? Where's our bedroom?
Meredith: I'm still mad at you and I don't know if I trust you, I wanna trust you, but I don't know if I do. So I'm just gonna try, I'm gonna try and trust you. Because I believe that, we can be extraordinary together. rather than ordinary apart and I wanna be ... (he kisses her)
Derek: I have to go.
Meredith: What?
Derek: In order to kiss you the way I wanna kiss you and in order to do more than kiss you I need to speak to Rose. I want my conscience clear so I can do more than kiss you. Stay here, don't move, wait for me.
This was better.