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How does adultery get proven during divorce proceedings?

Published: November 30, 2022

Last Updated: March 23, 2026

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How does adultery get proven during divorce proceedings?

In Canada, the breakdown of a marriage as a basis for divorce can be established in 3 different ways according to the Divorce Act. First, it can be proven by establishing that the spouses have lived separate and apart for one year. Second, if one spouse has committed adultery. Third, if physical or mental cruelty took place during the relationship and can be proven. Regardless of the grounds for divorce, a divorce is only final when a judge grants you a divorce order.

This article looks at what adultery is and how it is determined in divorce proceedings. It is not intended to act as legal advice but instead intended to be a general overview on a legal topic.

What is adultery? 

Adultery is when one spouse in the marriage has conducted an affair that the other spouse does not approve of or tolerate. For the purposes of filing for divorce, it is important to note that suspicion of adultery is not enough to prove that adultery did take place. There must have been some form of physical or sexual relationship between one of the spouses and someone else. Unfortunately, the Divorce Act does not consider phone sex or online cheating as a form of adultery given that it takes place from a distance.

However, there may be some exceptions to this under certain circumstances. We recommend you consult with a divorce lawyer if your spouse or partner has committed adultery and if you wish to protect your rights in your upcoming separation or divorce. Alternatively, if you have committed adultery on your spouse – we also recommend you consult with a divorce lawyer for legal assistance. 

Proving adultery through evidence

In Ontario, there is no prerequisite that requires a spouse gets caught in the act or that photos or videos of the affair should be provided to establish that adultery took place. On the contrary, in order to prove that adultery took place, the court must be satisfied on a preponderance of credible evidence that adultery has taken place. For example, if the facts of the case lead to a reasonable conclusion that adultery has indeed taken place – then that is enough to assume that adultery took place. 

In more recent years, the concept of adultery has also been expanded by the courts to encompass same-sex relationships. 

What if adultery only took place once? 

For the most part, it does not matter how long the affair was being conducted for. Even if it occurred only once, it can be enough to use the incident as a grounds for divorce. Also, adultery must have occurred before the divorce application gets filed. Every couple is different, where some may seek to forgive their spouse if adultery took place, others may choose not to forgive. How you respond to the adultery is a personal choice and there is no legal requirement that you must divorce or separate from your spouse if adultery took place. 

Contact our Toronto divorce lawyers for legal help

Whether your divorce is a contested divorce or an uncontested divorce – it can be an emotionally charged experience. When you throw adultery into the mix, a divorce proceeding may become a highly contentious divorce proceeding. For this reason, we recommend you hire a divorce lawyer if you need representation in a divorce proceeding that deals with adultery as the grounds for divorce.

At Gelman & Associates – we have been helping individuals in Ontario with their divorces for over 20 years. While our main office is located in North York – we also have  offices, by appointment only, in Aurora, Grimsby, Barrie, Mississauga, Scarborough and Whitby. Secure your family’s financial future in as little as ten minutes by scheduling a consultation with a member of our legal team. 

You can book your consultation by filling out our contact form here or by calling our office at (844) 736-0200.

Written by Lisa Gelman

Senior Lawyer

Senior Lawyer Lisa Gelman has over 25 years of family law experience and founded Gelman & Associates to provide strategic legal counsel in family law matters concerning divorce, parenting, separation, and more.

Frequently Asked Questions - divorce & separation

If you or your spouse are not in Canada, you can not get a divorce. However, you can end your marriage under the Civil Marriage Act. You can only end your marriage in Canada and not another country because your marriage is only valid in Canada.

Yes, you can date while separated in Canada. However, there is a legal implication to that. If the timing of your new relationship comes into question during your divorce, your relationship may be considered as an affair or adultery.

Yes. Our legal services are available in person, online, and over the phone. In addition, although our main office is located in Toronto, we have over 8 additional satellite offices located throughout central, southern, western, and eastern Ontario to serve family law clients across the province.

If you are litigating your matter, social media posts made by your spouse or partner may be relevant, especially if they contradict what your spouse is claiming in his or her pleadings.

For example, if a spouse is claiming financial hardship, a Facebook post that shows that spouse going on an expensive trip or posing with an expensive car can undermine such claim and potentially affect that party’s credibility in court if presented as evidence on a motion or at trial.

Further to photograph-based posts, statements that are made on social media by one party can be relevant if said posts (i) are related to the litigation, to issues of parenting and/or (b) contradict statements that were made by the party in his or her pleadings. For example, if a party is attempting to establish that he or she is an appropriate custodial parent, then recent social media posts about extensive partying and drug use made by that party may be relevant in court, as they may speak to that party’s fitness when it comes to appropriate supervision of a child in his or her care.

Yes, you can separate from your spouse. Separation does not have to lead to divorce. However, if you plan to remarry, you must file for divorce after one year of separation. Also, you may want to consider that if you just leave, your spouse may file for spousal support or child support.

It is advised however that before leaving, you try to have a separation agreement with your spouse.

Divorce can be a difficult decision to make, especially if you’re unsure if your partner will sign the petition. However, a divorce does not require your partner’s consent. Although it may be a long process if your partner doesn’t comply, they will not be able to stop you indefinitely.

The only ground for a divorce in Canada’s Divorce Act is marriage breakdown. This could include spousal infidelity, although infidelity alone could be difficult and emotionally taxing to prove in court.

You are not legally required to retain a lawyer to apply for divorce. However, a divorce application may involve important questions about parenting, support, property and procedural requirements. Independent legal advice can help you understand how a proposed agreement or court application may affect you.

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