I look over to you and give a look like, what are you up to ….here? No one can really see and you are pretty slick about it. You just smile and wink...and I trust my instincts (that would faith in you!! Ha ha) . Your hand slides under the skirt portion of my dress and now the surprise is on you!! No panties….. The look on your face is now priceless!!! We both laugh this time and you say aren’t you cold? I smile and say not now!! People start to move around the table so we quit. (I know darn) We. Both sisters smiled in agreement and poured their drinks and made their way to the back porch to soak in the hot tub.Setting their margarita glasses down next to the hot tub, Trista and Terrana shed their clothes. Even in the warm summer air, the warm breeze was enough to erect their bikini covered nipples. "So I have decided that when the time is right, I want you to be the first one I share Killian with," said Terrana bluntly melting into the water.Trista already in the hot tub slid over to. The gravity from other planets..." Well, not exactly. I'll give you a hint. Does the sun or the moon exert a greater gravitational pull on Earth?" The sun! The Earth orbits the sun, not the moon!" Correct! The sun's gravity on the Earth is about 200 times stronger than the moon's. Now, do Earth's tides follow the solar cycle or the lunar cycle?" The lunar cycle! Oh! Duh... I never thought about it like this... What's going on?" Tidal forces are determined by differences, or gradients, in. My dick throbbed and twitched. Pleasure surged down my shaft to my balls. Then her tits slid back up, engulfing my cock again.My nuts tightened as her breasts slid back down. Her tongue flicked across my dick again. I groaned, my head twisting from side to side. It was so incredible. I loved it. This pleasure was just the best. My toes curled as my balls grew tighter and tighter.Then she sucked on my cock. Just for a moment, I experienced heaven in her mouth before her tits slid back up it,.