You're an inspiring symbol of hope for the continuation of the species."I'd come around to the idea that I was essentially a good person and had a lot...to contribute to a relationship. The idea that I inspired hope for the continuation of the species was flat out absurd. It was so absurd I couldn't come up with a response.I was surprised at how exhausted I was when we got home. We hadn't been involved in any strenuous physical activity. I never realized how much energy could be spent worrying. Her hisses showed that she was loving the way in which i was fucking her cunt with my mouth & tongue.She had orgasmed once when i asked her permission to get fucked.She told me that she would beg me to fuck her.She was bit angry for trying her patience. I lowered my cock into her moist hole& started making forward & backward movements.Then to her surprise,i lifted both her legs with my hands & placed them around my neck.Then i told her to cross them as hard as she could.There were still away. That didn't mean I wasn't expecting to enjoy myself, just that my enjoyment was a secondary consideration in this instance. I needed to treat Brenda better, to ensure that she felt good enough about this experience that she'd want to keep on repeating it.Brenda had gotten up and was slowly undoing the buttons on her blouse. I saw that she wasn't happy with the way I'd been acting with her. I smiled and started helping her undress, kissing each of her bare shoulders when she tried to shrug out. ”“No it isn’t. We’re in the privacy of our own home with all the curtains drawn and only people who live here involved. It’s not like anyone’s going to be on display to the world.”“Fine, but she’s my sister. I can’t just -”“Rach, I know it’s out of your comfort zone, but honestly, you knew this would be when we started playing. We’re not hurting anyone and I’ve filled her in on the other rules. Besides, I might have a run of bad luck and wind up the only one naked. There’s no guarantee either.