Busted By Sis

OK, I'm 19 and in college, my older sister is my roommate and last weekend I got totally busted by her. I came home after a party and didn't realize that she was already home. I pulled out a porno and started jacking away with the volume really high, next thing I know she stumbles out of bed in her panties and a tee-shirt wondering what's going on. I tried to cover up, but she caught me mid stroke. So she smiles and tells me to continue, which I reluctantly do until I shoot all over my hand and stomach. She grabs a paper towel and cleans me off and asks if I can do that again... Afterwards she acted a little embarrassed, but we have continued our games, next she says she wants to get some of her friends involved. WOW!