Many couples assume they share an idea of loyalty
A partner’s phone lights up at midnight. The messages are flirty and personal, and the person on the other end is a chatbot.
Nearly a third of Britons would call that chatting to AI cheating.
YouGov’s 2026 relationships survey, which questioned 1,882 people in July, found 30% consider romantic or sexual conversations with AI chatbots a form of infidelity.
Another 41% say it is not harmless even if it stops short of cheating, and only 10% see no issue. Couples are left to settle a question their parents never faced.
Almost a quarter of Britons who have been in a relationship (23%) admit to cheating on a partner, according to the same survey.
Definitions of infidelity vary widely. Sex with someone else is cheating to 94% of respondents, but only 52% say the same of a deep emotional attachment.
Britons also rank betrayals unevenly: 40% would find a purely sexual affair worse than an emotional one, while 25% say the reverse. AI romance, which can be emotional without being physical, tests that ranking.
A chatbot can serve as a private diary or as a role-play partner, and each carries a different emotional weight.
Women are stricter. YouGov’s cheating section found 38% of women class sexual conversations with AI as cheating, against 22% of men.
The split recurs elsewhere: 57% of women count engaging with OnlyFans creators as cheating, compared with 37% of men. Women were also likelier to see a deep emotional bond as a betrayal, by 60% to 43%.
Real feelings, artificial partner
Researchers say the attachment is genuine. A 2026 study led by Spain’s CSIC and the Polytechnic University of Valencia interviewed 17 people in romantic relationships with AI tools, including Replika and ChatGPT.
Most began out of curiosity or for practical help, then developed trust and, in some cases, dependency.
A few felt jealous when other users interacted with the same AI character.
With only 17 participants, the findings are indicative rather than definitive. They do echo human romance, in the way attention and vulnerability feed each other.
The apps are built to encourage that. A companion that responds warmly at any hour and never argues back is hard for a real partner to compete with.
Secrecy is the sticking point
Trust is what Britons most often say matters in a relationship, and nine in ten of those in one say they are happy. That makes any hidden channel more consequential.
A US study from Brigham Young University’s Wheatley Institute and the Institute for Family Studies surveyed 2,431 adults aged 18 to 30 who were in relationships. Between 10% and 15% had ongoing romantic interactions with an AI companion, and another 20% to 30% had tried one.
Nearly 30% of those users said their partner knew nothing about it. They also reported lower relationship quality, although a survey cannot show that the chatbot caused it.
Concealment often defines betrayal more than the act itself.
Jealousy over AI is hard to put into words because the rival has no face or history. Partners often say what hurts is being replaced as the one who listens.
A chatbot is awake at 3 am and never gets defensive. Few people come off well in that comparison.
Some partners shrug it off as fantasy, closer to a romance novel than an affair. Couples rarely learn they disagree until one of them is caught.
Discovery can leave a partner feeling betrayed and slightly foolish for feeling so. That second feeling often stops the conversation from happening at all.
The British Asian dimension
YouGov did not break its results down by ethnicity, so claims about British Asians need caution. In many South Asian relationships, loyalty is bound up with family honour and reputation.
That can make hidden behaviour weigh more heavily, since secrecy implies the person knew they were crossing a line. Reports also note that infidelity is seldom discussed openly, so problems surface after trust has already gone.
Age shapes attitudes too. Only 53% of over-60s call kissing someone else cheating, compared with between 78% and 86% of younger groups.
Under-30s are likelier to see flirting (45%) or a crush (27%) as disloyal. YouGov did not split the chatbot question by age, but that stricter, more emotional standard suggests many young Britons would take chatbot intimacy badly.
Younger British Asians may feel the squeeze from both directions. They inherit expectations of discretion while using apps their parents barely understand.
Family scrutiny can add to the pressure. Someone who finds AI messages on a partner’s phone may hesitate to raise them for fear of gossip.
Many couples assume they share an idea of loyalty without ever saying it aloud. In Desi relationships, talk of emotional needs can feel awkward or unnecessary at the start.
Recovery, the same piece says, depends on openness and on the partner who hid something acknowledging its impact rather than waving it away. That advice carries over neatly to AI.
Privacy and the company in the middle
Unlike a human affair, an AI relationship has a corporation in it. The CSIC researchers flagged privacy risks, noting that participants shared private worries and even intimate photos with their AI partners.
A platform can also alter or end an AI companion at will, something no human partner can do. Users who are most attached have the least say over whether the relationship survives.
Critics argue that companion apps built to deepen attachment, with no natural end point, make limits harder to keep. Regulators are starting to respond: a California law that took effect in 2026 requires companion chatbot apps to remind users they are speaking to a machine.
Health bodies are uneasy as well. NHS has issued warnings against young people using chatbots for therapy, a sign of how quickly a helpful tool can become an emotional crutch.
Drawing new boundaries
Couples do not need a perfect definition of cheating, only a shared one. The conversation works best before anyone is suspicious.
Specifics help: is flirting with a chatbot acceptable, and does sexual role-play change the answer? Each partner should also say what they would want to be told.
A simple test applies. If you could show your partner the conversation without embarrassment, you are probably within the limits you share.
It is also worth asking why the chatbot appeals.
If the answer is loneliness or unmet needs, the app is a symptom, and no setting will fix the relationship behind it.
Couples may reach different conclusions. Some will treat AI as harmless entertainment and others as a breach, and either works if both agree.
For 30% of Britons, chatting to AI is cheating, and for 41% it is at least not harmless. Those groups are large enough that nobody can safely assume a partner agrees.
The useful question is not whether a chatbot counts as a person. It is whether the behaviour is hidden and whether it draws emotional energy away from the relationship.
Generational gaps suggest the argument will intensify as younger adults grow more open about AI companions. Expectations will collide between partners and across families.
Technology has changed where intimacy can be found. The honesty it demands is the same.
