Wear skinsuit of grandma

She opened the slit of the suit and saw the red insides. The desire to try the costume began to grow. The younger sister began to take off her black blouse, skirt and beige tights. Breathing heavily, she picked up her grandmother's suit and began to put it on. She pulled it over one leg, then the other. She had never worn anything like it, and she blushed. For her, it was just some Halloween costume that she wanted to try out of childish curiosity. The costume's pussy matched her pussy and she shuddered. She touched her new sagging ass, which was already bigger than her own. She felt a touch, it scared her, but she continued to put on the suit...

"WHAT ARE YOU DOING?!" came from the doorway.

The younger sister covered her face with her hands and turned away.

"What are you doing?! Take it off immediately," the elder pulled the younger by the hand, and she saw her red face.

"Haaaaa... I just wanted to try… I've always wanted to try a full body suit," the younger one stammered

"But why this one? Take it off! It’s disgusting!"

The youngest hugged her small breasts and was embarrassed.

"Please... just once… I don't want to try Mom...

The eldest rolled her eyes.

"Heck!... Well. Then I'll search the room for now, maybe I can find out something more about the pens."

It was inconvenient to dress in front of her sister, but slowly she began to pull the suit up to her chest. The suit immediately shrank in the places where she put it on. She felt old, and there was no trace of youth left.

At this time, the elder was searching the room. But so far, she hasn't found anything but a pile of latex clothes and toys. Although on the table she noticed a box with another pen and instructions. She put the black pen in the case and began to examine the instructions.

At this time, the younger one had already put her hands into the sleeves of the suit, she was scared that now she had a big sagging chest. She grabbed it and it was as if she was electrocuted, she had never experienced this before, even when her sister was washing her. She started playing with them, and apparently she was getting excited. It was a strange costume, but she decided to finish the transformation, and put a mask on her head. The suit was a little bigger than her, but she seemed to have increased in size. The mask shrank, the suit seemed to become her second skin. She exhaled loudly and said in her old voice:

"I'm done. Oh my God, my voice!" she closed her mouth in amazement.

The eldest was frightened when she heard a voice that she hadn't heard for many years.

"Listen, this is weird. Take it off!"

"Hehe, I'm already an adult, I want to stay in this mature body for now," says the younger one

"It's already overripe! Can you put something on while I am searching?"

The youngest went to the wardrobe and found black lace underwear there. When she put on her panties, this pleasant feeling passed over her again. She rubbed her pussy a little with her panties, and it was amazing. But it was strange and she stopped, and continued to put on a bra. Next, a skin tight leather dress caught her eye. And there were high-heeled shoes nearby. Her breasts no longer seemed so saggy with a bra, and therefore when she put on a leather dress, it was slightly baggy, in places even too much. Putting on her shoes, she went out to her older sister.

"Ok? I like it… I've never worn this before."

The older sister made a facepalm. Then she said that the black pen allows you to turn people into costumes, and the brown one allows you to get memories, but there was some kind of warning.

"Maybe if we get her memories, we can find out what happened to our mother?", the younger one suggested.

"What happened to her and so everything is clear, she turned her into a skin with a black pen", stated the elder.

"Then maybe we can find out why our grandmother did this?"