Jesy Nelson has revealed that she made the painful decision to end her engagement to Zion Foster after the devastating diagnosis of their twin daughters placed an unbearable strain on their relationship.
The former Little Mix singer said she and Zion responded very differently after learning that Ocean Jade and Story Monroe had spinal muscular atrophy Type 1, a serious genetic condition that causes progressive muscle weakness.
What followed was not a lack of love, Jesy explained, but two exhausted parents trying to survive the same trauma in different ways.
The 34-year-old has now opened up about the separation in footage filmed for a forthcoming continuation of her Prime Video documentary journey.
The programme captures the moment Jesy and Zion received the diagnosis that changed their family’s life.
In the emotional footage, Zion admits he feels completely out of his depth — emotionally, physically and mentally — and says he is simply trying to survive.
Jesy later reflects on how the pressure affected their relationship, explaining that a crisis of such magnitude can either bring a couple together of such magnitude can either bring a couple together as a team or gradually pull them apart.
Sadly, she said, it did the latter.
Jesy confirmed that she was the person who eventually decided they would be better living separately.
She explained that both parents were processing the diagnosis differently, and that their contrasting ways of coping led to constant clashes at home.
For Jesy, the atmosphere became incompatible with the kind of energy she wanted to create around their daughters.
She wanted the twins’ home to feel positive, calm and filled with as much hope as possible.
Although ending a four-year relationship and engagement was painful, Jesy believed separation offered the family a better chance of achieving that stability.
Importantly, she stressed that there is no hostility between herself and Zion.
They remain connected through Ocean and Story, and their children continue to be the centre of every decision they make.
The admission gives a more complicated and human picture of their breakup.
From the outside, the timing appeared shocking. The couple’s separation became public only weeks after they disclosed the twins’ diagnosis.
But behind closed doors, both parents were carrying fear, grief, exhaustion and the relentless demands of caring for two seriously ill babies.
Their story is a reminder that a major childhood diagnosis affects an entire family.
It can change routines, finances, sleep, relationships and the emotional balance of a home almost overnight.
Jesy and Zion welcomed Ocean and Story prematurely in May 2025 following a difficult pregnancy. The babies spent time receiving specialist hospital care before eventually coming home.
Months later, the parents began noticing developmental signs that led to further medical investigations.
In January, Jesy revealed that both girls had been diagnosed with SMA Type 1.
The condition affects motor neurons, resulting in severe muscle weakness that can interfere with movement, swallowing and breathing. Modern treatments have changed outcomes for many children, but early diagnosis and rapid access to specialist care remain critically important.
Jesy has spoken openly about the intensity of the girls’ daily medical care.
She has described the emotional conflict of carrying out procedures intended to help her daughters while hearing them cry, as well as the constant pressure of appointments, treatments and monitoring.
Some days, she has admitted, feel almost impossible.
On others, the twins’ strength and personalities give her the hope needed to continue.
Rather than withdrawing entirely from the public eye, Jesy has chosen to use her family’s experience to campaign for newborn SMA screening.
She argues that earlier testing could allow babies with the condition to receive treatment before serious symptoms develop.
That campaign has already gained significant political attention.
A petition calling for the evidence around SMA screening to be reviewed is scheduled for debate in Parliament on June 22.
England is also preparing to begin an in-service evaluation of newborn screening for SMA from October 2026, involving hundreds of thousands of babies.
Jesy celebrated the development as an important milestone, while making clear that she intends to continue pushing for every newborn to have access to early testing.
Her decision to continue filming after the diagnosis was equally deliberate.
She and Zion initially agreed that their experience could help create change, even though allowing cameras into such a painful chapter was extraordinarily difficult.
The resulting footage is expected to show not only the medical reality facing Ocean and Story, but also what happens to parents when the future they imagined suddenly disappears.
For Jesy, that includes confronting the end of her relationship.
There is sadness in admitting that the diagnosis contributed to their split, but there is also honesty.
She is not blaming Zion.
She is not presenting herself as the only parent struggling.
Instead, she is acknowledging that two people can love their children completely while no longer being able to function well together as a couple.
Zion’s admission that he felt he was merely surviving reflects the enormous emotional burden both parents faced.
Jesy’s decision to separate reflects her own attempt to protect her energy and create a more stable environment for the twins.
Their romantic relationship may have ended, but their responsibilities as parents remain inseparable.
Jesy has said her priority now is to become the best mother she can be: positive, present and strong enough to keep advocating for her daughters.
Ocean and Story’s diagnosis has reshaped nearly every part of her life.
It has changed her home, her relationship, her public purpose and her understanding of motherhood.
Yet through the fear, Jesy continues to speak with fierce belief in her babies.
She calls them strong and resilient.
She believes they can defy expectations.
And even after the trauma tore one part of her life apart, she remains determined to build something hopeful from what remains.
