Other Mommy Ending Explained: What Happens To Bela In The Horror Novel And Will The Movie Follow Suit?

Spoilers ahead for Incidents Around the House.

Other Mommy, the new horror film starring Jessica Chastain, brings one of the most unsettling questions in Josh Malerman’s novel Incidents Around the House to the big screen: What happens when a child’s imaginary friend wants to enter her heart?

Directed by Rob Savage, the film follows Bela, a young girl whose life takes a terrifying turn when a mysterious entity begins appearing in her home. The entity, known as Other Mommy, repeatedly asks Bela for permission to enter her heart. What initially seems like a disturbing childhood experience soon becomes a threat to Bela and her entire family.

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The film releases exclusively in theatres on October 9, 2026. Chastain plays both Bela’s mother, Ursula, and the sinister entity, adding another unsettling layer to the story. However, the biggest question for readers of the original novel is whether the film retains its devastating conclusion or takes a different route.

Here is what happens to Bela in the book and what it could mean for the movie.

What Happens To Bela In The Novel?

In Incidents Around the House, Bela’s encounters with Other Mommy become increasingly frightening as the entity finds new ways to get close to her. Despite her family’s efforts to protect her, the presence continues to haunt them.

Bela’s parents also have problems of their own. Their strained relationship and the secrets surrounding their family make an already terrifying situation even more complicated. As the story progresses, Bela begins to lose faith in the adults she once trusted.

At one point, Bela tells her family that Other Mommy is gone. However, the threat has not disappeared. The entity continues to manipulate the situation, and Bela eventually discovers that even the people closest to her may not be safe.

The novel’s final sequence takes the horror to its darkest point. Bela discovers her grandmother’s body hidden in a closet and realises that the figure who had been with her was actually Other Mommy in disguise. She then finds her parents dead.

Left alone and devastated, Bela encounters the entity once again. It asks her the same question it has asked throughout the story: Can it go inside her heart?

This time, Bela says yes.

Does Other Mommy Take Over Bela?

Yes, the novel strongly suggests that Other Mommy takes over Bela’s body after she agrees to let it enter her heart.

The moment is particularly disturbing because Bela’s decision comes after she has lost the people she loves and has been pushed into complete isolation. The entity has gradually worn down her sense of safety until she finally gives in.