Signs Your Girlfriend Is Cheating With a Coworker

by Jenny Parker

Considering the amount of time each week that most people spend in the workplace, it is only natural to develop close friendships with coworkers. But sometimes these friendships can develop into something more, which is problematic if one of the parties involved is already in a serious relationship. If you’ve begun to suspect that your girlfriend may be cheating on you with someone she met at work, the following are a few common signs that you can look for to determine whether or not your suspicions are justified.

Sudden Interest in Work

If your girlfriend previously disliked her job and now seems excited to go to work each day, it could be a sign that she’s particularly interested in whom she will see there. You might also notice that she’s begun making a stronger effort to dress nicely, perhaps even buying new work clothes, as well as making sure that her hair and makeup are done perfectly each morning.

"Working Late"

Someone who is cheating with a coworker may begin spending extra time at work, or using a heavy workload as an excuse to leave earlier than usual in the morning or return late at night. She may begin claiming to have to work on weekends in addition to keeping erratic hours during the work week and hiding her pay stubs from you to cover up the fact that she’s not working all the long hours that she’s claiming.

Lack of Invitations

Accompanying your partner to work-related events is a normal part of any serious relationship. If your girlfriend used to invite you to go with her to holiday parties, company picnics or other work functions but those invitations have since stopped, it may be a sign that she would rather appear single and spend quality time with a certain coworker at these events.

Mentioning Someone Frequently

While normal workplace friendships are no cause for alarm, if you notice that she is mentioning a certain person’s name more frequently than anyone else’s, this combined with one or more other issues may be a warning sign of infidelity. If a woman is romantically interested in someone, she is apt to talk about him more than usual without even realizing it.

Secretive Behavior

One of the most common signs of any type of affair is sudden secretive behavior. A cheating girlfriend may begin leaving the room and speaking in a low voice when talking on the phone, deleting emails and text messages, and quickly closing out of windows on her computer when you enter the room. However, it is important to remember that even if your girlfriend is displaying some of these signs, it does not necessarily mean that she is cheating. Be careful and consider the consequences before making any accusations.

About the Author

Jenny Parker is a New England-based entrepreneur who has been writing since 1995. Parker writes extensively on creative self-employment and genealogy; her work has appeared on and She also has self-published several short story collections and is currently working on her first non-fiction book chronicling the history of her ancestors in America.

Photo Credits

  • my girlfriend image by Patrizier-Design from