To treat somebody= to pay for something for somebody

To treat somebody has a variety of meanings depending on the context. Today, I’m using it as an expression which means that you are going to pay for something for somebody else. For example:

• Janette: Fancy going to the cinema Pepé?
• Pepé: Sorry Janette, I can’t because I’m broke.
• Janette: Don’t worry Pepé , I will treat you.