A mother who slept with her husband's father after she was comforting him about the death of his late wife has revealed that she is now terrified he will find out.

The anonymous woman, from Australia, revealed her angst-ridden dilemma to parenting site Kidspot users, and admitted she's been left feeling 'terrible'.

Explaining that she and her husband Ben, who she shares a baby girl, Leila, with, have been happily married for five years, she branded the one night stand a 'drunken mistake' and 'pity sex'.

A mother from Australia who slept with her husband's father has revealed she is terrified he will find out, confessing her story to parenting site Kidspot (stock image used)

Taking to the site in a lengthy confession, she began by admitting that her marriage would be over if her husband ever found out.

She wrote: 'Ben’s mother Josie died of cancer a few months ago when she was just 52 , and the whole family was devastated, no one more than Ben’s dad Phil.'

The woman went on to explain that her husband suggested his father stay with them while he grieved, and she started to grow close to her father-in-law.

Explaining that her husband Ben went away for a few days leaving her and his father Phil to care for Leila, she recalled how she joined him for a drink one evening.

Explaining that she and her husband, who she shares a daughter with, have been happily married for five years, she branded the illicit encounter a 'drunken mistake'

Describing how events unfolded, she continued: 'We stayed up late and had a few too many drinks. I don’t usually drink much but Phil asked me to stay with him a bit longer, as he showed me through an old photo album from early in his relationship with Josie, when they were at high school together.'

The woman went on to describe how she started to let her guard down after the whiskeys began to flow.

Admitting it was 'no excuse', she added: 'He was so sad and when I gave him a big hug, things started to feel intimate.

'Before I knew what was happening, his mouth was on mine and then clothes were flying everywhere and we were having sex on my kitchen table. The place where I sit and eat breakfast with my husband and daughter every morning.'

Revealing that it was 'over quickly' and they slept in separate beds that night, she told father-in-law Phil the next day that it had been a mistake, and despite her father-in-law agreeing, the woman revealed she has been left terrified that he will say something to her husband

Revealing that it was 'over quickly' and they slept in separate beds that night, she told Phil the next day that it had been a mistake.

And despite her father-in-law agreeing, the woman revealed she has been left terrified he will say something to her husband.

'Phil hasn’t said anything or even hinted at it, but when he thinks Ben isn’t looking, he’ll sometimes grab my hand or my bum and give me a squeeze,' she concluded.

And with the story shared to Kidspot's Facebook page, the post soon garnered hundreds of likes and comments.

After the story was shared on Kidspot's Facebook page, the post soon garnered hundreds of comments

One horrified reader argued that she should tell her husband and let him decide how to move forward with their relationship

One horrified reader argued that she should tell her husband and let him decide how to move forward with their relationship.

She wrote: 'Couple of drinks and you're sleeping with your father-in-law, you need to beg forgiveness and tell the truth better to own your mistake. Your hubby needs to make the decision on what happens next'.

Agreeing, another wrote: 'I think your partner need to know what happened cheating on him with his father'.

Another highlighted all the potential damage she had caused, writing: 'Nice work. Wrecked your marriage and the dad wrecked a father and son relationship.'

Slamming her actions, one woman wrote: 'That is unacceptable', while another said: 'Talk about daddy issues'.

But others were more lighthearted about the post, with one joking: 'Wonder if she was thinking that's not how your son does it.'