Dumb daughter

My daughter was going over to the neighbor's house to visit but didn't want to miss a call from her boyfriend so she took the cordless phone with her. While at the neighbor's she wanted to check back at home to see if her younger brother was okay. My daughter then picked up the neighbor's phone and dialled our number. While waiting for someone to answer the phone at home, the phone she brought over with her began to ring. She immediately hung up the neighbor's phone and answered our phone. There was no one there. She wanted to know who it was who called so she used our phone to call our house. The line was busy. Getting very frustrated she left the neighbor's to go home and see who was on the phone. No one was on the phone. My daughter could not figure out what was going on until someone explained it to her.