Give Her A Break, Or So You Thought

You think that Jen is probably feeling screwed up right now. She went from just being a normal sister to now eating your cum twice, hell she even jerked you off. You decided to take pity on her and just deal with you new hard on by yourself. As she showered you headed into your room and laid down on your bed.

You threw your pants off and started to stroke yourself thinking about the days events. The images of your sister with a mouth full of cum, jerking you off, and of course her dirty talk were all you focused on. It actually didn't take long for you to get close to your edge but you nearly jumped out of your skin when you heard Jen, "What the fuck are you doing?!"

You looked up and saw Jen standing in your door way in her nightwear which was just a white tee-shirt and a pair of black panties. "Sis what the hell, why did you come in here?" You asked embarrassed,

"I didn't you jackass, you left your door open. Now again what do you think you're doing?" Jen said crossing her arms,

"I'm jerking off what does it look like?" You replied,

"We had a rule, you need to do it, you make sure that you give your cum to me. You don't fucking waste it." Jen said walking into your room,

"I thought I should give you a break, I mean you already had two loads today." You said defensively,

"You know one load isn't enough so why would two be good? Besides I'm sure that this will only be a little, most guys cant get a spurt after two times in one day." Jen said sitting down on your bed,

"Not me, one of the reasons I work with giving patients my cum is because I produce a lot of it. So you should expect a decent amount." You said beginning to jerk yourself again.