The power behind him is in full force, and driving deeper. I dig my nails deep into his ass, pulling him forward, deeper inside me. I silently demand ...ore, and he does. He gives me more, fucking me hard. I feel him stiffen, and know he’s going to give me the biggest orgasm he can. He growls out and I feel myself clench him. I milk his cock as he begins to shoot jet after jet of his seed inside me. He groans a ragged growl as he does, making me stiffen in climax. I feel myself orgasm hard around. She explained what Judy had told her about when she was a teen and that Monte was her dog and she used Monte a lot for the same thing. She then explained to me when a dog cums their cock is engorged and grows immensely in size and locks in what is called knotting and it could last for 5 to 30 minutes. After about 20 minutes Monte’s let go and he pulled out and Kris took him out of the room.I looked at Judy and asked if she was ok. She looked back with a huge smile on her face and said, “yes it. I don't see me turning up in your bedroom unannounced twice a week. All I'm offering is something you might call a service -- a fairly comfortable and pleasurable defloration. You can do what you like about this -- it's an offer, not a demand. But given the number of quirks your mother has, making your initiation into sex as smooth as possible probably has a LOT of long-term benefits." I eyed her. "I don't think I'll ever bring this up again -- it seems to raise your hackles too much. You can. . just undo it ... let the straps lie on the side."With her whole back free I could really massage her, get into those long strokes that loosen the tension. She was groaning with contentment. I was getting turned on by touching her and seeing her skin ripple under my hands. I told myself, You're a weirdo, getting a hard-on for your mom. That's not what's supposed to happen. But whether it was supposed to happen or not, it was definitely happening ... and I liked it. As she relaxed, I could see.