Humorous joke: Sister, can you let my father sit on your lap?

Humorous joke: Sister, can you let my father sit on your lap?

There is no seat to take my daughter by bus, and there is a beautiful woman next to her, who seems to like my daughter's appearance very much.

I said to my daughter, "Ask my sister, can I sit on your lap?"

The daughter asked the beauty, "Sister, can you let Dad sit on your lap?"