Kyle does not want to participate in Lisa’s fantasy of her being a human doll. She takes the choice away from him by presenting herself as a doll. He figures he’ll call her bluff and is surprised when she does not object or break character at all.
I liked Kyle’s hesitation. Lisa was completely into the fantasy. Kyle was not but he figured he’d prove her wrong when he did things to her she did not like. He tried to make her break out of character. It was weird to watch only one person participating in the sex act while the other was so passive I wondered what she took to stay that way. This is different for me but the writing was good.