Draco used the time she was in the bathroom,to take his robe off, and get ready for bed.
When she got back and under the sheets, he rolled toward her, and put an arm around her waist. Draco smiled softly. "Why are you apologising, love? If anyone understands, it's me. They go away, darling, and then I get to see you naked. Now, get some rest. You can worry about everything in the morning."