What sort of mare would turn down the chance to help a friend? Twilight's been there for me so many times in the past, but now she's a princess with all the new obligations and duties that come with that. The transition... hasn't been an entirely smooth one. Who better to lend her a helping hoof and show her how one deals with nobles, courts, and politics than moi?
I only hope it doesn't end up costing one of us our sanity along the way.