Finding the front door key is probably the easiest way in, so you scan the front of the house looking for hiding places for a small key. After lifting up about a half-dozen random stones, peeking behind posts, and checking under the welcome mat, you finally hit the jackpot as you discover a false bottom in one of the flower pots on the front porch.
"That wasn't so hard," you think as you grab the key from inside the secret compartment. Key in hand, it's a simple matter now to unlock the front door and let yourself in.
"Mom!" you shout out, hoping someone can hear you as you take a few steps through the entrance. "Dad! Sis! Can anyone hear me?"
The halls echo with deafening silence. With nothing else to do, you decide to search the house hoping to find any sign of your family. The living room is the obvious starting point, being closest to the front door. Nothing really looks out of place here; in fact, it looks almost exactly as it did when you moved off to college. The big brown leather sofa, the television, the chairs, the coffee table, they're all the same. It doesn't look like anyone has been in here recently, so you decide to move on. The dining room and kitchen similarly turn up nothing, not even a hint of today's lunch or even breakfast. You poke your head into the garage and basement, but still no luck. The unsettling feeling in your stomach grows the more you search the house. It's as if they've all vanished without a trace!
You are about to panic when suddenly you hear strange muffled noises coming from upstairs. You can't exactly place what those noises were, but at least you've finally found a sign of life in this house! You creep up each step slowly, trying to create as little noise as possible. Fortunately, your childhood memory of which steps were creaky pays off now as you ascend the stairs without making a single sound. The muffled sounds are louder now, and you can identify them as human, at least, but you still aren't sure what they are or who is making them. Stealthily, you continue farther down the hallway and reach the closed door to your parents' bedroom. Holding your ear to the door, you can now easily identify the sounds as muffled moans of pleasure from inside the bedroom, and you think you can even recognize them as your mother's.
"Oh no," you think to yourself, "I hope she's not doing what I think she's doing in there..."
You are about to walk away and let her finish whatever she's doing when you feel your pants begin to bulge. You have never really thought of your mom as anything other than Mom, but a nearby picture of her hanging on the wall reminds you that she is still quite an attractive-looking woman. You stare at the photograph for a moment, taking in the sight of her beautiful shoulder-length hair and captivating smile, not to mention the form-fitting dress that accentuates her ample breasts and rump. An image of her nude curvy body writhing in ecstasy creeps into your mind, further hardening your member and delaying your departure back downstairs. After all, your girlfriend did dump you not too long ago, and you've been yearning for intimacy lately. Maybe such a beautiful woman wouldn't mind filling in temporarily, or rather being filled, that is...
The moans from within the bedroom suddenly grow louder, snapping you back from your thoughts. Figuring that you should take advantage of the situation while you can, you grasp the doorknob and rapidly fling open the door, silently gasping as you witness your mother on the bed...