Rachel goes into an unexpected premature labour during tonight's (December 13) double bill, leaving Jai feeling helpless over the baby.
"Things really start to heat up and Jai actually becomes quite disgusting in some of the things he starts saying," Oaten revealed.
""He really does go for Sam in a big way because he can't stand the fact that he can't be the dad to his baby and yet he sees Sam pushing the pram."
Rachel will shatter Jai's fatherhood dreams, punishing him for not telling wife Charity of their one-night stand and allowing Sam Dingle to help her care for the child.
> 'Emmerdale' Gemma Oaten talks Rachel's baby drama - interview
> 'Emmerdale' Chris Bisson talks Jai baby nightmare - interview