Could be felt that the slickness originated mostly from where Gabriel's cocks were emerging from, and that it would be easy to spread it with fingers. Very easy. Couldn't help how his hips rolled, encouraging that dipping fingers with a lower noise- "Very natural, makes life a little easier. Keep going." Definitely would make this activity easier on top of it.

When slick actually started to leak from his slit, Gabriel dipped fingers in to it enough to ease the stroking of Jack's own cock. Allow him to squeeze with every stroke tat much easier, thumb circling along the head. "Bit of thrill and anticipation?"

His own cocks emerged more, bit by bit, with every encouraging movement, letting out a low noise once they were fully emerged. The air certainly cooler than where they kept tucked away safely.