If I Had Legs I'd Kick You ending explained: why you never see the daughter's face until the beach
Mary Bronstein’s panic attack of a film hides its most important character in plain sight for nearly two hours — and the reveal, when it comes, is the entire point.
For almost the whole of If I Had Legs I'd Kick You, Rose Byrne's Linda has a daughter the way one has tinnitus. The child is a voice off-screen, a feeding pump alarm, the top of a head, an elbow, a demand. What she never is, until the very end, is a face. That's not coyness — it's the film's whole argument, and it resolves on a beach.
A film locked inside one skull
Bronstein's second feature — which won Byrne the Silver Bear, then a Golden Globe, then an Oscar nomination — traps you in Linda's subjectivity and never once lets you out. A therapist in Montauk, she's managing a daughter with a feeding disorder, a husband who exists as a hectoring voice on the phone, a ceiling that has collapsed into a symbolically throbbing hole, a motel exile, and her own therapist (Conan O'Brien, superbly withholding) giving up on her. The camera stays on Byrne's face for what feels like the entire run time. Everyone else — A$AP Rocky's motel superintendent included — is something that happens to her.

The child is abstracted the most ruthlessly of all, and deliberately so. Bronstein keeps her to wisps of hair and an urgent off-screen voice precisely so the audience can't latch onto an adorable moppet and start judging Linda on the child's behalf. The director is blunt about the register she's working in:
"I'm very disinterested in realism or verite."
Her stated model is Eraserhead, and the sound design behaves accordingly — the child arrives as noise, pressure and obligation, because that is what a child is to a parent drowning at this particular depth. Whilst Linda cannot truly see her daughter, neither can we. The form is the diagnosis.
What actually happens at the end
The final movement, briskly: Linda hits bottom, removes her daughter's feeding tube — and hallucinates the ceiling hole sealing itself — then breaks down entirely and, at the shore, runs into the surf repeatedly in an attempt to end things the sea refuses to cooperate with. She wakes on the sand. Beside her, at last in focus, in daylight: her daughter's face, smiling. Linda's whispered response is the film's closing line —
"I'll be better, I promise, I'll be better."
The logic of the withheld face pays off in one cut. The child gets a face at the exact moment Linda surfaces from her own head long enough to look at her — sight as the first act of repair, not a reward for it. There's no tidy recovery arc appended, just a title card: the film is dedicated to Bronstein's own daughter, Faye.