Bargaining

A conversation between Silas, Grammy, and me:
Grammy: "Silas, when you're older will you mow my lawn for me?"
Silas:  "Probably no.  Probably yes.  A little of both."
Me: "Silas I bet Grammy will pay you to mow her lawn."
Silas: "How much will you pay me?"
Grammy:  "How about $2?  Would you mow my lawn for $2?"
A Pause
Silas:  "I'll mow it for $10."
Me:  Laughing out loud, "I bet you can get her to go to $20 Silas."
Grammy: "Erika Dee...you're not supposed to say that!  Silas, I was hoping you would do it for free since I'll be old and feeble and you feel bad and love me so much."
Silence
Silence
Silence
Silas: "I'll do it for $10."