Cheating is never acceptable, but having an affair while your partner is pregnant is even worse.

One woman, however, has been left completely heartbroken after she discovered her husband has been doing exactly that. The mum-to-be claimed she is currently 28 weeks pregnant with her second child, and found out her partner has been going behind her back to cheat on her - for the past four months.

Pregnancies are tough at the best of times, but the woman said she spent 18 weeks in the hospital due to her "extremely rough" pregnancy and described the experience as "terrifying". She admitted she's been constantly worried about her baby's health, and it put a "strain" on her family.

But during all of this turmoil, the father of the unborn baby somehow found the time to cheat on his wife and the mother of his children - and gave her a horrible five-word excuse when confronted about his actions.

After admitting to being unfaithful for months "without an ounce of remorse", the man tried to blame his wife for making his eyes wander. He told her: "You're just focused on the baby."

In a post on Reddit, the heartbroken mum said: "He confessed without an ounce of remorse. Instead, he said he needed excitement and attention elsewhere. He accused me of not being the woman he fell in love with anymore, blaming my mood swings and our circumstances for pushing him into another woman's arms.

"In his words, 'I miss the old you. You used to be so much more fun and exciting. Now you're just focused on the baby, and it's boring. She made me feel wanted and alive in ways you haven't in months'.

"Yes, I was exhausted and emotionally drained during those months in the hospital, feeling utterly helpless and cut off from the world but I did not expect he would betray me at such a vulnerable time. A lot of my energy was focused on protecting our unborn child."

The woman said the ordeal left her feeling "overwhelmed, stressed, sad, numb, and angry", and she no longer knows what to do about her relationship. She said she feels "betrayed" by her husband, but can't help feeling as though she's "fallen short" somehow and let him down.

Commenters on the post, however, were quick to tell her that none of this is her fault. Many encouraged her to reach out to any family or friends she could for support while she deals with ending her marriage.

One person wrote: "Anyone who cheats on their wife while she is carrying their child has no sense of morals. I'm so sorry he hurt you like this. He is a selfish human being and his actions have disrespected both you and your children. You deserve better. Reach out to family and friends and make a plan on what to do next."

Another added: "I know it's scary being a single mum, but really? Don't let him make you doubt yourself. It's not your fault he's a cheater. A good man would be understanding and try to help you out as much as possible during pregnancy."

Do you have a story to sell? Get in touch with us at yourmirror@trinitymirror.com.