I came to bed late and horny. Climbing under the covers I found my wife on her side, her bare bottom waiting for me. My cock needed little else to achieve a rock-hard erection, which I guided between her fleshy ass cheeks until my flared cock-head rested against her tight anal ring. As we spooned I thought of our anal sessions which, despite my clear preference for them, are few and far between. Although she usually plays with her pussy and cums during anal she has never been an enthusiastic fan of it, and my 2-inch wide cock doesn't make it any easier. My cock throbbed hopelessly against her firmly closed back door while she slept. After 30 or 40 minutes I had almost gone to sleep too when I felt something give. The resistance had faded and my semi-hard cock was oozing past the constriction of her sphincters and into her rectum. The feeling was fantastic. I slowly hardened inside her, stretching her sphincters further, and sinking deeper into her usually forbidden ass. Still she had not woken up, or even stirred. Her breath was steady, her slumber undisturbed. I didn't want to move. I wanted to savor the sensations in my cock. But then I felt it. Her sphincters clinched around my shaft, gently squeezing me and then releasing. This happened twice. When they could not expel the intruder the most amazing thing happened. Still entirely asleep, she began rocking her hips, pushing back onto my pole. Her body was reacting on a subconscious level to this invasion of her anus by my fat cock not by causing her pain, or waking her, or even trying to pull away. Rather it acted on pure instinct by fucking the shaft buried in her, regardless of the hole it occupied. As her arousal increased we fucked, but I don't think she was ever fully awake, as she did not remember anything the next morning.
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