Picture this: you’re recovering from heart surgery, and you find out your boyfriend has been cheating on you with your own sister! That’s exactly what happened to our heartbroken protagonist. She discovered her boyfriend of four years, Robbie, had been cheating on her with her younger sister, Allie, for the past six months. After confronting the cheaters and kicking Robbie out, she learns that even her own mother knew about the affair and did nothing to stop it. Let’s dive into this rollercoaster of a story…
Cheating Boyfriend Exposed!

️♀️ Snooping Through His Phone

Confronting the Cheater

The Heartbreaking Reason

Kicking Him Out

Confronting the Sister

Sister’s Lame Excuses

Family Reactions

Mom’s Shocking Confession

Allie’s Past Relationship

Not Speaking to Mom

Shipping Robbie’s Stuff

Harsh Words for Mom

Mom’s Suicide Attempt

Saving Mom

Supporting Mom

Dad and Sister’s Opinion

Regretful Words

Cheating Boyfriend, Betraying Sister, and a Mom’s Dark Secret
Our heartbroken protagonist discovered her boyfriend, Robbie, had been cheating on her with her younger sister, Allie, for six months. After confronting the cheaters and kicking Robbie out, she learns that her own mother knew about the affair and did nothing to stop it, claiming Allie deserved happiness after her past relationship. The protagonist, feeling betrayed by her own family, lashes out at her mom, saying she should have let her commit suicide two years ago. Now, she’s left feeling guilty and seeking opinions on the situation. Let’s see what the internet thinks of this heart-wrenching tale…
Betrayed by sister and mother, commenter is justified in going no contact.

Mother & sister betrayed OP, deserves nothing. NTA

Mom caused own marriage problems, sister sleeps with bf – NTA

NTA. Betrayal by sister and mother. NC with both.

Sister sleeps with sister’s boyfriend, and mother takes sister’s side

Heartbreaking betrayal by family, cut ties and seek support

Cut out toxic family members, expose betrayal, and heal

Scorched earth time! NTA takes revenge on trashy sister.

Betrayal by sister and boyfriend, sister’s fault, mother’s favoritism. Forgiveness?

Mom thinks being a side chick to your sister’s BF is justified?

A questionable inquiry about a family betrayal

No contact, expose the truth, NTA – sister and ex betrayed

Cutting out toxic family members

Sibling betrayal and mother’s defense sparks ESH/NTA debate. ♀️

Family betrayal is never ok. NTA for not forgiving.

Going no-contact might be the best decision for your sanity

NTA commenter receives support after being provoked by sister

Choosing between sister and boyfriend can be tough

Encouraging comment on toxic family situation

Sibling betrayal leads to justified confrontation

Support for OP against toxic mother and sister

Betrayed by three important people, NTA for a hurtful response. Seek therapy.

Petty but remorseful sister sleeps with sister’s boyfriend

Supportive comment calls out mother’s behavior, affirms NTA stance

NTA stands up to defending mother and sister

Family betrayal: Take a long break from all of them

NTA. Harsh, but mom deserved to hear it. Stay away.

Parental disapproval and tough love advice for family betrayal

A possible mother’s betrayal: warning signs and moving on

Betrayed by sister and mother, OP goes slight NTA

Mother needs to apologize for sister’s betrayal. Sorry for you

A betrayal that cuts deep

NTA. A justified scorched earth response to homewrecker sister.

No apology needed, trust dissolved. Cut them off.

Cutting off toxic family for self-love and respect

Stay strong and take a break from toxic people.

Cutting off toxic family members: a liberating decision

NTA. Mother and sister are the AHs. NC is best.

NTA comment calls out the mother’s behavior with shock.

NTA comment calls out the mother’s favoritism and lack of support

Heart surgery infidelity with sister. Mom takes sister’s side. NTA

NTA. With a mother and a sister like this, who needs enemies?

Cut them off, send a bill, and never look back

Feeling unappreciated by family

Cutting off family ties: dealing with betrayal

Defending cheaters and sister’s affair was egregious. NTA.

Cutting off toxic family members: sometimes it’s necessary ✌

Family betrayal and guilt, but manipulative mom complicates things. ESH.

Mother justifies sister’s betrayal; commenter not in the wrong

NTA for wishing NC with egg donor and sister

Cutting ties may be tough, but necessary for your sanity

Forgive yourself, cut ties with mother and sister. NTA

Cutting toxic family members is sometimes necessary

Sister’s betrayal leads to a painful family feud

Family betrayal and attempted suicide – cut them off completely.

Prioritizing self-care after family betrayal

Mom lets sister sleep with boyfriend, commenter supports OP (NTA)

Choosing between violence and emotional warfare after sister’s betrayal ♀️
![Image credit: [deleted] | [deleted]](https://static.diply.com/abeecb6e-217f-46c0-88fb-c74c6cfc3554.png)
Cutting off toxic family members is necessary for your child’s well-being

NTA despite saying an a**hole thing. Family betrayals hurt

Supportive comment stands with OP, calls out mother’s betrayal.

Surviving betrayal and illness: go no contact for self-care.

Cutting out toxic family members: NTA for going no-contact

Cutting off toxic sister after betrayal, NTA.

NTA, but guilty feelings persist. Apologize to maintain moral high ground.

Cutting toxic family members out of your life
