I was startled by the unexpected sound, and couldn’t help glancing at the lightstone behind me. It glowed in a couple of inches of water. The chambe... was huge. Because the light didn’t reach the far walls, or pierce the shadowed ceiling, I still didn’t know how large the cavern was.I turned back just in time to catch a bullet of gooey green gunk in the face. Blinded, I hollered, “Slimes!”, heart pounding in my throat.I wiped a hand across my eyes, but it wasn’t much help, so I used my skirt. I. Weirdly, I started to feel torn; I enjoyed hearing Helen’s sexual fantasies and activities and talking about mine, but due to the shame of my secret fixation on her I found it increasingly difficult to have these conversations. I was afraid I would give my secret away and felt I was being disloyal to my brother. I started to tell her less and tried to discourage her from telling me about hers. Eventually we had an argument; she started crying saying that we used to be so close but were now. But his fingers touching around my naval was making me restless. I lost the sense of how to react. I felt his hand traveling up slowly. I was already leaking and afraid at the same time. I didn’t move. I felt his fingers moving on my right breast and he found my nipple over the thin fabric of the Blouse and Bra. As he pinched it between his thumb and index finger, I couldn’t hide a moan. I guess it inspired him to continue, he cupped my breast and squeezed it hard. It was hurting a little.. I was enjoying my meal and her fleshy stomach.I was now totally on top of her. I trapped both her arms under my knees. She looked puzzled about what was going to happen. I pulled down my shorts and revealed a long, throbbing healthy cock. She looked at it greedily with wide eyes. I grabbed both her breasts and squeezed them together forming a narrow, tight ridge between them. I quickly pushed my cock inbetween them in and out. She looked shocked and said "my husband has not done all this what.