soporiphic--Ann

sop·o·rif·ic  (sp-rfk, sp-)

adj.

1. Inducing or tending to induce sleep.

2. Drowsy.

n.

A drug or other substance that induces sleep; a hypnotic

Ann finds reading a book a soporific, so when she reads aloud, she falls asleep in the middle of a sentence sometimes: there is a very long pause, and when I look up, she shakes herself and continues on.