DD, 2.9 is going through a defiant phase at the moment. As part of this, she is saying "no" to everything, even things she wants to do.
This morning, DH offered to take DD to the library (normally a favourite activity) before he goes to work later, so I can catch up on some jobs at home. DH asks DD to come. She says no. I make it clear that I will not have time to play for the next hour. DH leaves, she screams "I want to!". I encourage her to get shoes on and chase DH down the street, and tell him she now wants to come. She does. He then encourages her to get in the car. She says "no". I tell her that I will count to three, and if she doesn't go, she will come back home, as DH needs to get off to work afterwards. She doesn't get in the car. I take her home. She is now wailing "I want to go!" and is showing no signs of stopping . I am continuing with the chores, and have said that I will play when I'm done.
Too much to expect at 2.9 ?