My cock was now straining to get out of my jeans, I had to let it out but before I did I had to check on Erin again. I quickly went back to our room a...d quietly opened the door. Erin was still passed out in the same position as before so I closed the door and hurried back to Kat.Kat had not moved at all either except that her mouth was now closed. I knelt down next to her again, staying on my knees and quietly undid my jeans and slid my zipper down, then wiggled my jeans and underwear below my. I really wanted to and had no choice. I couldn’t say, “no you’re my sister” because they would’ve thought who knows what. I took some lotion in my hand and gently rubbed it into her shoulders and all the way down her back. I got a little braver as I worked my way back up to the sides of her breasts. I didn’t go all the way around or anything, but it was where her side meets her breast and could definitely feel the plumpness of those firm tits. I took my time, gently and firmly rubbing. Up my ass went her finger, and with a quick jerk and a grunt on my part , I lost control, and came with gushing force. She shoved me deep in her mouth and waited for every last drop, to empty in her mouth, so carefully, as to not leave one bit of lusty evidence of our sexual encounter in this very public place. She shoved my pants back up hastily, and reached for her purse, while still in seclusion, under the table. Then to my surprise her cell phone was handed to me, as she popped up from the. She kept telling me to relax and just take it. She told me to let my ass loosen up. I had never done this before so i wasnt sure how to relax.. I just let my mind leave worry and i focused on taking her fingers and made myself hornier by imagining her inside me. Next thing i know she stops fingering me and i feel her huge cock on my hole. She pushes into me and owe! I pull away in pain. I tell her that hurt n she calls me a bitch lol. I lay there on my stomach waiting for my hole to quit.