Feeding Tage

I was about to feed Tage some food the other day and asked Lena if she wanted to help. I was surprised that she said yes.She was really excited about it. She fed him a couple of spoonfuls.( He kept taking the spoon away from her and she would get mad.) Then she would get down and go do something else.But every time I tried to take over, she would get upset with me and start the process over (fed him a couple of spoonfuls, get the spoon taken from her, complain, mommy give her the spoon, get bored and leave, mommy feed Tage, mommy get in trouble, Lena feed Tage).