Janine prematurely goes into labour in an upcoming storyline, resulting in her giving birth to a very weak baby daughter.
The actress told Soaplife of the plot: "The situation freaks [Michael] out and gradually he pulls away. There's another couple in the unit and the dad is there all the time.
"Janine gets cross and has a go at Michael because he isn't. She's worried that he's going to take all her money and run."
The 31-year-old also revealed that Janine, despite her previous misgivings, will develop a maternal bond with her baby.
"She spends her whole time next to her incubator," Brooks added. "She's a total wreck and feels like running away, too, at times, but she knows she can't. She is all that her daughter has got and she's terrified her baby will die."
However, Brooks recently stated that Janine should not change her "Cruella de Vil character" as a consequence of starting a family.