Conditional love

I overheard this conversation today whilst the kids were playing in another room.

Missy Moo: "Dinoboy - do you love me?"
Dinoboy: "Yeah I do."
Missy Moo: "Dinoboy? Can I play with your Lego helicopter thing?" (pointing at a small Lego helicopter Dinoboy spent ages building without any supervision)
Dinoboy: "No."

A few minutes later ....

Dinoboy: "Missy Moo? Do you love me?"
Missy Moo: "Not yet."