A woman who has long been suspicious of her husband's friendship with another woman has been left feeling lost after discovering a love letter.
Taking to the internet to seek advice, she explains that her husband became friendly with a single mum who lives on the same road after often walking the same way on the school run.
We'll call the author of the post Eve, her husband Jason and the single mum Rachael to try and make it easier to follow.
After a few school runs together, Rachael revealed to Jason that she is moving away and asked for his details so they can keep in touch, which Eve says she commented was strange and decided to also add Rachael on social media.
Rachael later deleted Eve from Facebook and continued to like most of her husband's posts.
Unknown to Eve, Rachael and Jason started chatting and meeting up with their children for activities like shopping and lunch.
After being spotted together and word getting back to Eve, she spoke to Jason about breaking boundaries and warned him that the other woman has her eyes on him - although he insisted Rachael just needed a friend.
In her post on Mumsnet, Eve writes: "I have now found a letter from her to husband confessing undying love and that she wants to marry him, have children etc.
"Her letter makes it clear that nothing physical has happened and that he has said he wouldn't leave me but he's obviously making her think she stands a chance.
"Husband knows I have found this letter and will be dealt with when he gets back from work."
She finishes the post by asking if she should reveal to Rachael that she knows all about the letter and what she is up to with her husband.
Other users were pretty unanimous that she was focusing her anger at the wrong person.
One said: "No. This is aaaallll on your husband. You’re absolutely right, he's making her think she stands a chance.
"He could have shut this down ages ago, but he didn’t. He’s loving it. Why has he even kept the letter?"
Another wrote: "Nobody declares their love like this unless they've been led on.
"I think your husband is being unfaithful here. He hasn't discouraged her at all."
A third said more bluntly: "No. She is irrelevant to you, your husband is to blame. When he gets home from work tell him to leave and go and live with her."
We think Jason's got some explaining to do.