The sudden sense of double penetration inside your cock and ass makes your heart race faster, as you enjoy this new pleasure. You feel your ass get stretched open wider with each moment as whatever is sliding into you presses deeper. Your penis is also stretched open wider as the suit presses deeper, causing slight burning sensation.
Eric looks at you, "Your face is red, are you sure your ok?"
You close your eyes slowly and nod slowly, as you now feel like someone has their whole arm pushed into your ass. You no longer feel any more stretching, but the feeling of your being stuffed is making your cock rock hard. The slight burning in your cock slowly stops. Each beat of your heart feels like your penis is stroking whatever is inside it. Feeling very turned on, you open your eyes and smile.
Eric says, "We need to get off this boat. There has to be a raft or something we can use."
You quickly respond, "And fast."
Eric stars to walk forward, looking for a small boat of some kind. You follow behind.
After a few steps, you feel the suit start to push something larger through your ass. It quickly passes, but repeats a few more times. After the last time, your cock explodes in orgasm. Unable to stand, you lean against a wall, feeling out of breath.