Faith Cadogan may be stronger than most in Holby’s Emergency Department, but emotionally, the cracks are starting to show.

Following weeks of tension with Iain Dean, their fragile attempts at reconciliation are hanging by a thread. While Iain has recently suggested they give their relationship another chance, Faith isn’t convinced his motives are entirely romantic. Her fear? That he’s more invested in being present for the baby than truly repairing what they once had.

And upcoming episodes may prove her instincts right.

After reportedly heading into town for drinks to clear his head, Iain finds himself making a reckless decision that could devastate everything. Spoilers suggest he shares a night with a younger woman — a moment of weakness that may spiral into something much more damaging.

The biggest question isn’t just whether Faith will find out.

It’s how.

Holby has never been short on secrets unraveling at the worst possible moment. If Faith discovers the betrayal while navigating pregnancy hormones, professional pressure, and unresolved trust issues, the fallout could be explosive. Those close to her have already noticed she’s emotionally guarded — and another breach of trust might push her from cautious to completely closed off.

Meanwhile, Iain’s guilt could begin affecting his performance at work. Paramedic shifts demand absolute focus — and if his personal life starts bleeding into the ED, patients could pay the price. Could a mistake on shift expose the turmoil he’s trying to hide?

There’s also the looming question of long-term consequences. If Faith decides she’s done for good, Iain may be forced to confront what he truly wants — family stability or freedom from responsibility. And if the truth surfaces publicly within the department, their colleagues may be forced to choose sides.

Faith has rebuilt her life before. She’s survived addiction struggles, professional setbacks, and heartbreak. But this time, the stakes feel different. This time, there’s a child involved.

If Iain has betrayed her again, this may not just be the end of a relationship.

It could be the beginning of a war.

And in Holby ED, emotional explosions rarely stay private for long.