A woman wondered if she was wrong to refuse to go to her sister’s wedding because her brother is marrying her ex.

The unnamed 27-year-old took to Reddit to reveal that she has a history with her sister’s fiancé.

She revealed that she dated Mark for three months in college before he suddenly did it.

After cutting off communication, Mark began dating the woman’s 29-year-old sister, who he calls Rachel, and the two are now set to tie the knot.

The woman admitted that she always felt like she was in her sister’s “shadow”, so it stung even more when her brother started a romance with her ex-boyfriend.

She explained the situation from AITAH subreddit, as she opened up about her tumultuous relationship with Rachel.

The woman testified that she made it clear that she did not want to attend her sister’s wedding.

However, after Rachel and her family branded her a ‘machine’ for not attending, the 27-year-old begged people on the web to tell her if she was the ‘gap’ in the situation.

A woman wondered if she was wrong to refuse to attend her sister’s wedding because she was marrying her ex (stock image)

The post was titled: “Am I a blunder for refusing to support my sister’s wedding because of the way she treated me?”

She explained: “I (27F) have an older sister Rachel (29F) who has always been the ‘golden child’ in our family.

“Growing up, she was the smart, pretty and talented one, while I was always in her shadow.

“My parents were constantly comparing us, and try as I might, I could never measure up to Rachel.

“He got better grades, had more impressive jobs, and always seemed to get everything he wanted without much effort.”

The 27-year-old noted that the pair’s bond was further damaged when Rachel started dating Mark, who is her ex-boyfriend.

She added: “Fast forward to now: Rachel is engaged and the whole family is obsessed with her wedding. She’s getting married to a guy I dated briefly in college – let’s call him Mark.

“We dated for about three months before he suddenly asked me out. A few weeks later, Rachel introduced him as her boyfriend.

The unnamed 27-year-old took to Reddit to reveal that she had a history with her sister’s fiancé.

“It was incredibly awkward, but she dismissed my feelings, saying, ‘It’s not like you two were serious.’

The 27-year-old admitted that it was extremely difficult for her to move on.

Because of this, she decided to skip the wedding. However, her choice has landed her in hot water with her family.

“I’ve tried to move on, but every time I see them together, I feel like I’m being erased. Rachel asked me to be her bridesmaid and I honestly don’t want to do it,” she said.

“I don’t even want to go to the wedding.” I told her as much and she completely blew up, accusing me of being selfish and bitter.

“She said, ‘You’re just jealous because I’ve always been more successful than you.’

“Our parents are pressuring me to ‘get over it’ and be with her, but I don’t feel like I owe her anything after years of being number two.”

At the end of the post, she asked if she was wrong to ditch her sister’s wedding.

She wrote: “Some of my friends agree that I should set boundaries and not let her walk all over me.

“Others think I’m petty and it’s just an old sibling rivalry. Honestly, I’m torn.

People on the web flooded the comments section and came to her defense while slamming her sister, who was called Rachel

“Am I stupid for refusing to support my sister’s wedding because of the way she treated me and her history with her fiance?”

People on the web flooded the comments section and came to her defense while slamming Rachel.

One person said: “This is just a power play by your sister, stand your ground… trust me, your crazy sister is insecure and obsessed with you because you are better than her. Next time try to find her deepest wounds and whenever she tries to hurt them, stick your finger in her wounds and keep twisting until she breaks. Don’t a** hole.’

Another user commented: “No a** hole. Your feelings are valid and you should never do something you don’t want to do.

– Not the hole. An invitation is not a summons. Your sister and family should learn to take NO for an answer. Not a complete sentence,” someone else wrote.

A fourth person added: “Don’t you just love it when people try to shame you into doing what they want?” Not the hole. I would set limits and block anyone who crosses them.