This is the moment an unlucky man apparently films his wife cheating on him with another man on his birthday.

The incident reportedly took place in the north-eastern Brazilian state of Paraiba and the footage went viral on WhatsApp on Friday 2nd July.

The footage shows how the man arrives home from work early on his birthday, only to find his wife on her back on their bed with a naked man on top of her with her legs over his shoulders.

The man, who had apparently suspected the illicit relationship was going on for some time, walks in on the pair, prompting the naked man to say “sorry, sorry” as he puts his trousers back on.

The duped husband can be heard saying sarcastically “you can stay as long as you like, you can have her there”.

He also tells his rival “you can finish your service” as he films him sheepishly gathering his clothes and leaving.

The man also tells his unfaithful wife to pack her bags and leave with her lover. However, she refuses, protesting “you’ve done the same thing to me”, which he denies.

According to reports, the man who filmed himself being cheated on was celebrating his birthday at the time, adding insult to injury.

The identities of those involved were not reported.