[A4A] World building -The Birthday Present

All your life, it's just been you and your mom. Your father, a scientist, was lost in a space mission that went wrong. Mom always said he was still out there somewhere, but you figured that was just her way of coping. You'd sometimes see men leaving her room in the morning, but you never gave it much thought. "She can't be alone forever," you'd tell yourself.

Today is your eighteenth birthday, and you've spent the day celebrating with friends. Dinner with your mom was great. You talked for hours about everything and nothing. Back home, you said your goodnights and collapsed onto your bed, exhausted. That's when you noticed it – a package tucked away on the top shelf of your open closet. You couldn't remember seeing it there before.

Curious, you pulled the box down. A note on top read, "Happy Birthday." A jolt went through you. This wasn't from your mom; she had just given you a new BMW car. Tearing off the wrapping paper, you found a transparent box filled with a strange, black slime. "A prank from one of my cousins," you thought, but you opened it anyway. The moment your fingers touched the thick, gooey substance, it began to glow.

Startled, you dropped the box. As it hit the carpet, the slime swirled and solidified, taking the form of a young man in his late twenties.

"Hi..." he said, his eyes familiar, as if he'd known you forever. "I'm Andrew... your father."

You stood there, stunned into silence.

"You look surprised," he chuckled, walking over to the window. "Oh, and I'm not the slime," he added, seeing your shocked and confused expression. "This slime is my shape-shifting pet. It's a messenger, bringing you this from... well, from the other side of the universe."

He moved closer to you. "I've missed watching you grow up, being stuck on this planet. But I'll visit you soon, I promise." He smiled warmly. "The main reason for this message, though... this pet is for you. Take good care of it. It can transform into anything you've touched or anything you can imagine now that you're bonded." With a wave, the man's form dissolved, and the slime fell to the floor.

"Oh, one more thing," a new voice said. The slime had reformed, this time into the shape of your mother. It walked towards you, leaning in to give you a clear view of its cleavage. "I gave a similar pet to your mom. Did she ever mention it?" it purred. "Try not to do anything too naughty with this... not that I could stop you. See you soon."

And with that, the black slime collapsed, flowing back into the box and collecting itself neatly inside.

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Thanks for reading. If you have read so far and are interested in discussing or cowriting this plot, go ahead and dm me. This could go a lot of ways, both sfw and nsfw way.

Kept it gender neutral, as I'm open to everyone. Looking for someone literate and flexible.

My only limits are vore, gore and extreme violence.