Cheater, cheater.

A woman who has been working as a professional escort for over 10 years is sharing red flags that indicate your partner is cheating.

Elizabeth Romanova, now in her early 30s, has been an escort since she was 18, according to Jam Press.

Her experience has given her the upper hand on how to determine if a person she is interacting with is single or is cheating on someone at home.

“The signs are there — a wedding ring is somewhat obvious, but some are more subtle,” she told Need to Know.

Packing a bag with a change of clothes is one of them.

“Some clients show up wearing one outfit, then change into something for our time together, then switch back before they leave to avoid anyone smelling my perfume or any other traces of our meeting,” she said.

Another is the rearranging of a schedule.

“A lot of my clients will mention that they have told a partner they’re at ‘work drinks’ or ‘last-minute meetings,’ ” she said.

When it comes to being physical with her clients, a cheating client often tells Romanova to be careful that she doesn’t “leave any marks, even on covered parts of their body.”

Another unexpected sign of cheating in a relationship, for some, is changes in the bedroom.

“Some people go the other way and become more excited for sex with their partner [after meeting an escort],” she explained.

“They become suddenly more adventurous, trying out things they’ve picked up elsewhere.”

Putting the physical business aside, according to Romanova, there are also subtle signs that can indicate a person is emotionally cheating.

“Some treat our sessions like therapy and open up about how they feel distant from their partner,” she said.

“If your partner is pulling away emotionally, that could be why.”

A not-so-subtle sign is how your loved one acts with their phone.

“They [clients] often reiterate in our communication that they don’t want to be contacted at certain times, or they forget the time of our meeting because they’ve deleted the messages from their phone,” Romanova said.

She added, “If someone suddenly changes their passcode, starts taking calls in another room, or guards their phone, this could be a sign that they’re more than just ‘busy.’ “