Sentence:  He'd meant to only kiss her, to play a bit with her mouth, to place small kisses on the fragile bones of her cheeks, but when their tongues met, the gentleness flamed to full-fledged wanting. His cock <WSD>gorged</WSD> swiftly, and he pressed her tight against him between his legs. 
Meaning of the word marked with <WSD> tags:  To fill up (an organ, a vein, etc.); to block up or obstruct;  of ice: to choke or fill a channel or passage, causing an obstruction.