The actress's character Debbie Dingle and ex Andy Sugden (Kelvin Fletcher) have recently conceived a baby to secure a bone marrow match for their daughter Sarah, who is seriously ill.
Debbie and Andy get the news they have been hoping for in tonight's (March 9) episode as they discover that the unborn child is a match.
However, Webb told Soaplife that there are still no guarantees when it comes to Sarah's future.
"There's more worry, stress and complications in store for Debbie," the 24-year-old explained. "The odds of the treatment working for Sarah aren't good. There's such a massive mountain for them to climb."
Tonight's episode also sees Debbie's troubled relationship with Cameron Murray (Dominic Power) reach a turning point as he agrees to stay in the village for her.
Webb added: "Debbie would do anything to save her daughter. Her biggest fear was Sarah getting sicker. Losing Cameron was next."
Emmerdale airs weeknights on ITV1.
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