He parts his lips, taking her thumb in his mouth, running his tongue over her skin, slow, deliberate, like he's tracing the alphabet. It's talented, that tongue, and could easily be put to better use elsewhere.

When she takes it from him he groans a little, rocking up a little into her. His cock is painfully untouched, hard and heavy, flushed and beginning to leak. It doesn't help when she drags her damp thumb over his skin, nipple pebbling under her touch.