As ex sis in law suckled slowly and calmly at my n*****, I became acutely aware of the scent of her arousal, and saw the dark spreading wetness on her p******. I was hard again, and still trapped down the leg of my tight underwear. She seemed so serene and tranquil, only an occasional murmur of contentment. I was in a place of something i could not describe, deeply emotional but also a very physical plane. Arousal but so much more than that. At one point, I gently slid my hand between us and tried to pull my erection up so that it was at least not trapped down my leg. She opened her eyes and looked up at me, calm and unreadable. Once my erection was upright and free, I took my hand back from between us and cradled her closely as she suckled. She occasionally changed sides but simply kept suckling slowly and steadily. I could feel the tension and pleasure building in me from head to toe, and realized that I was possibly about to o***** spontaneously. My breathing was becoming deeper and faster, and she kept her eyes open looking up at me intently. Since she had the experience from our past dynamic of me paying her for sez, she had the knowledge that the way my body was starting to quiver, especially my thighs, she knew that I may be about to o*****. She switched to the n***** that she had not heavily marked overnight while she latched onto me and masturbated, and without breaking eye contact her hand slid down into her p****** briefly, then she put a fingertip wet with her own musk to my free n***** and very gently stroked and teased it. I gasped and by now the aching head of my c***…nothing to brag about in length but very thick with a bluntly tapering head…was jutting up out of my underwear, we were both aware that it was dripping a non stop stream of precum against the back of her shoulder, her skin felt warm but cooler in contact with my painfully hard c***. As she delicately stroked my exposed n***** while suckling on the other gently but relentlessly, I felt my testicles tighten and my body tensing tightly, and she put her fingers wet with herself to my lips and I did not hesitate to take them in my mouth and s*** the taste of her from them. God, I had missed the sublime taste of her. She began to flick her tongue across my n***** in her mouth as her fingertip teased the free one, and I gasped her name desperately as I felt the surge in my c*** as I erupted spontaneously. She smiled around my n***** looking up at me as she suckled, and I felt and heard her chuckling as she felt my c*** twitching and jerking against her back as my weeks of pent up pleasure and frustration burst out of me, splattering her back out of my sight but multiple drops were visible as my c*** pulsed with a few drops arcing up and over to land on her shoulder and tank top. It seemed to go on forever as she kept the eye contact and my spasms abated and I gasped for breath. I just looked down at her reeling from the first o***** for her since admitting my love for her. She dis not seem to notice the soaking wetness on her back and shoulders as she broke off my n***** and laid back in my lap, seeming very content with herself. She smiled and asked if i minded if she had another go, and i told her by all means please. I cradled her in my arms as she slid her hand back into her pantied and looked up into my eyes as her hand moved inside then. Her back arched and she closed her eyes in anticipation and I told her to not dare close her eyes. She opened them and saw me looking at her face, her eyes widened enormously, and she nearly screamed as she came. My god it was f****** beautiful. When she came back down she turned her face into my stomach and kissed and licked my skin. She looked up at me shyly and suggested a shower. I told her nope, she owed me a long slow bath.