His reaction should be plenty of an answer for her - the way his hips lift slightly, pressing his cock towards her grasp. Yes she has to 'search' for it, but it isn't as if it has moved from where it usually is just because he's wearing pants! Her plans are most pleasant, he wants more of them.

And once she is able to touch and tease him, his groan of pleasure is another reply, another way to say yes.