Occasional small slapping sounds rising between us when she forgot and plunged her fingers too far, too fast. Finally, before we reached the next stop... she reached her goal, pressing herself backwards, harder against the wall and her shoulders outwards against my wrists, I felt she was trying to keep from collapsing under the physical and emotional overload she seemed to be experiencing.I squeezed my wrists inward as much as I dared, trying to help her but not able to do too much for fear of. It happened like, it was raining quite heavily and we 2 were in office working late, my hubby was also out of town. After we finished work he dropped me back home, but we were quite drenched in rain, so i invited him for a coffee over to my place. We went inside and i helped him change to a lungi and t-shirt of my hubby and i came dressed in a short nightie wearing no bra, only panties. We then sipped coffee, and later after an hour shared a few drinks. Some how i saw his gorgeous and enormous. I couldn’t help myself, I started to get hard making Haley gasp. All the girls began to laugh again, making me feel small. I was embarrassed but still rock hard, and Jessica started to undress in front of me. Tina and Haley decided to undress too, and soon all three were naked in front of me. They were my sisters, but they were so sexy. I thought I would bust my load right there and then.Jessica picked up her panties from the floor, picking up Haley’s and Tina’s at the same time.“Here, sniff. Was it satin panties she was wearing! It felt just like her swimsuit fabric. It was then that I felt like doing something which I couldn’t try when she was in swimsuit. I went behind her and spooned her once again. My cock rested vertically on the crack of her butt covered in her satin panties.Then I inserted my hand in between and took my cock. I lead it to the back bottom edge of her panties where her left leg popped out. I inserted my finger in-between her panties and the beginning of her.