A young woman came home one evening with her boyfriend.

As they walked through the front door, she called out to her mother, “Mom, we’re going upstairs to my room for a while.”

Her mother, who was sitting in the living room, looked up and said, “Alright, honey. You two have fun.”

The couple went upstairs, closed the bedroom door, and everything was quiet for a few minutes.

Then, from upstairs, the mother suddenly heard loud voices.

“Baby, baby, baby, oh!”

She froze.

A second later, she heard it again.

“Baby, baby, baby, oh!”

Alarmed, the mother jumped up from the couch and rushed upstairs.

She stopped outside the bedroom door and knocked loudly.

“What on earth is going on in there?” she demanded.

The young woman opened the door slightly, looking confused.

“Mom,” she said, “relax. We’re just having fun.”

Her mother placed a hand over her chest and let out a huge sigh of relief.

“Oh, thank goodness,” she said.

The daughter frowned. “Why? What did you think we were doing?”

Her mother shook her head and replied:

“I thought you were listening to Justin Bieber.”