Because sometimes even Time Lords needs someone to talk to...
[when he kissed her, her eyes widened, but fluttered shut, and despite herself, she kissed back. No use of alien drugs or mind control... and it had been so long since someone was so intimate. But it wasn't who she wanted. she broke the kiss and leaned away slightly]
Sorry, I- I can't do this. I still don't know what you want from me, Master...