Back to the USSR

One evening you didn't know what to do and decided to go chat with your mom.
Your conversation turned to the times when Mom was little and how she and Dad were in the same class. She spoke enthusiastically about those moments, and there was a spark of nostalgia in her eyes.
She told you about the school, the park, even about the prices that were before and that the gadgets we hang out on 24/7 didn't exist.
After listening to your mother’s stories, you thought for a moment how great it would be to go back in time for a couple of days and see what it was like there.
You went to bed, and in the morning you woke up in an unfamiliar place...
(It turned out you ended up in your mother's parents' apartment where she had lived before, you were 14 years old. Looking around, you saw a bed next to the one in the same room where your mother slept, only your age)
(You ended up there as your mother's sister)