She saw his chest expand as he drew in a great breath.

Rhage's chest expanded as he took in a great breath.

Her chest expanded as, without looking up, she drew another deep breath.

His skinny chest expanded visibly as he pulled on it.

I wasn't sure she needed to breathe, but her chest was expanding.

You will feel your upper chest expand and push your right hand up.

The Prince's chest expanded while he saw to her request.

His chest expanded and contracted with a hollow, rushing sound in the high air pressure at sea level.

He saw her chest expand as she sucked in air.

His chest expanded as he drew in a deep breath.