He absolutely didn't need to hide his interests from her. She wouldn't always want to participate, of course, but she definitely wouldn't judge him.

She sighed as his fingers found her clit, pleasure blooming at his touch. Her slit was already wet and slippery with his semen and her juices, but he could feel how hot she was, how plumped her clit and labia were with her arousal.

She slid a hand down to find his cock, brushing her fingers against it, seeing what state his arousal was in.