He was waiting to see which she would choose; now he has his answer. The Master takes in her obvious pride and affection for the ship with an assessing eye. It's quite a bit like the Doctor, really.

"I can see already why she's so special to you," he purrs, to get his mind off that ugly comparison. In reality he's amazed the thing can get off the ground, and he thinks the thing looks rather akin to the rocket ship he built as a human. Serviceable, perhaps even ingenious in its way-- but ultimately pathetic and limited.

He brings the bouquet from behind his back as he draws closer and holds it out to her. "Thought you might be interested in these. They grew on my home world. It's a bit past their season, but then I'm not entirely sure this City observes quite the same calendar."