Bargaining Part 2

Me: Time to go and change (into pajamas)
Aiden: Don't want!
Me: Have to go and change already
Aiden: 4 minutes
Me: ok after 4 minutes must go and change ok.

4 minutes later....
Me: Ok 4 minutes already
Aiden: 2 minutes
Me: No, just now you said 4 minutes
Aiden: 1 minute
Me: No
Aiden: 6 minutes