She started to refuse, but her stomach was threatening to rumble, so she gave in.

His stomach churned and threatened to make him purge himself.

My stomach was churning with increasing violence and threatened to explode.

She swallowed it until her stomach threatened to burst.

Her stomach knotted and threatened to retch at any moment.

Kelson's stomach threatened to revolt as he saw what had been done to him.

His stomach was threatening to vomit up the water he'd drunk moments before.

For a moment her stomach threatened to rebel; then the combination of texture and food value went to work and she began to feel better.

Her legs were shaky and her stomach threatened to retch with every step she took.

His stomach threatened to revolt but this also passed.