What's the punch line of this cold joke?

One day I came home from work and forgot my key.

Suddenly I saw a neighbor's five-year-old Beckham passing by and looked at the small window of the link house, so I had a plan!

Coaxed a long time to plug Xiaobei's nose through the window. Originally, he wanted to invite someone in to open the door. As a result, the little guy just didn't open the door and cried in it. She fucking heard it and still can't forget her brooding eyes. ...