Things get heated

Your father popped one of your mother's nipples into his mouth and started sucking. This caused your mother to moan in a manner you have never heard from her before. You were in awe at the scene, for years you had tried to imagine what it may be like, even going as far as trying to peek, but this was the first time you were seeing it up close. As your father continued to suck and nibble on her nipples, alternating between the two occasionally, you could see the moisture begin to build up around your mother's pussy. Her moans started to get louder as well; her forgetting completely that you were even in the house and may hear.

"Oh god Dave! I haven't felt this ready in so long, fuck me now!” you mother demanded in her arousal.

“Get on your knees Karen, I haven’t felt like this since we were in college.”

Your mother quickly obeyed as your father stepped aside. Rolling over she quickly propped herself up on her hands and knees. It was a great picture, your mom on her hands and knees, her ass high in the air with her pussy fully exposed.

Just then your dog Fido ran through the open door of your parents room. Fido was a 1 year old St. Bernard that your family had adopted nearly a year ago. When you had first got him he could fit in your hand, but over the months he had grown even larger than you. The last month or so Fido has been humping everything in sight, now he was making a B-line right to your bent over mother.