The nipples hardened instantly, revealing her desire to him.

Like his manhood beneath her hand, they instantly hardened to his touch.

The liquid polymer hardens instantly on contact with water.

"Under you," she whispered, and laughed with excitement as his body instantly hardened in response.

Her glance, coupled with the way she said his name, made him harden instantly.

It was only a short step for his imagination to picture her astride him, and he hardened instantly.

Rugar's eyes went black, and his body hardened instantly against hers.

His face hardened instantly, and the conversation was practically over.

The plastic goo hardened instantly, and the terrifying hiss cut off.

A guy who had an outfit that moved like nylon but could instantly harden into a suit of armor.