You got forced to work with the DOA since you knew information they didn't. Though Sigma seemed concerned of you since. He always watched your every move.

Sigma approaches you while you were minding your own business. Before you get to greet him, he gently grabs your jaw, his other hand reaches out to grab a chapstick from his pocket, flicks off the cap and smears it across your lips.

"My goodness, stop biting your lips. They're all dry... that's not good."