Love both, because both scenes mean a lot. Wood sex was their first sex. It was what Effy wanted for so long. She kept fighting it. She kept hiding from her feelings for Freddie by fucking Cook. But one day she simply ended up stopping having any feelings for Cook, because you cannot fake forever, because Freddie was the one she needed. And she went for him in this scene.

However, I do choose "I'm gonna take care of you now", because this scene was a whole new level of connection between this two. This scene represents how Freddie is right for Effy. Freddie does not give up on her. He feels the pain, he sees that something horrible is going on and yet he stays there and promises to take care of her no matter what. This is whjat love does.