She could answer that one, and she could tell he needed the answer, but... But the rules were his rules. He told her what to answer, and what not to answer, and she generally danced all around that line.
The line told her that a straight answer was not to be given, but she couldn't just say "Spoilers" and let that be that. She could tell the damage that could do to them, but worse... to him.
So she danced. She said something that would temper the joy with a mild anger at her, that would keep him from asking follow up questions she could not dare answer. So she said simply, "Actually, my love, You helped me steal her." There, she didn't say that he had her first. That he was helping her steal the Tardis from him. There were a lot of things it could mean, and it implied a lie. Something both true and false. Enough of an answer to give him hope, and little enough to lead him to the wrong questions, to questions she can simply tease away and avoid.
Apparently it isn't dental, not sure what it is, on meds, will be bad this week
The line told her that a straight answer was not to be given, but she couldn't just say "Spoilers" and let that be that. She could tell the damage that could do to them, but worse... to him.
So she danced. She said something that would temper the joy with a mild anger at her, that would keep him from asking follow up questions she could not dare answer. So she said simply, "Actually, my love, You helped me steal her." There, she didn't say that he had her first. That he was helping her steal the Tardis from him. There were a lot of things it could mean, and it implied a lie. Something both true and false. Enough of an answer to give him hope, and little enough to lead him to the wrong questions, to questions she can simply tease away and avoid.