AITA for telling my sister I don’t want her daughter living with us?

A new mother with a six-month-old baby is at her wit’s end after hosting her 28-year-old niece for four months—and now faces backlash from her sister for suggesting the niece move out. The niece, a high-earning banker who relocated for work, was welcomed as family but has refused to pitch in with chores, expects meals and cleaning, parties loudly on weekends, and even brings strangers home late at night.

When the niece complained to her mother about feeling unwelcome, the aunt firmly told her sister that if Grace dislikes their household rules, she’s welcome to find her own place. This sparked fury from the sister, who accused her of being unfair to her “baby.”

‘AITA for telling my sister I don’t want her daughter living with us?’

The arrangement began as a kind favor to help the niece settle into her new job location.

Problems quickly emerged from Grace’s entitled behavior and lack of consideration.

The tipping point came when Grace complained to her mother, leading to a heated confrontation.

Hosting adult relatives can blur lines between generosity and obligation, especially when parenting styles differ dramatically across generations. The poster’s frustration is rooted in disrupted household peace and unreciprocated effort while caring for an infant. What makes the story more complicated is the family pressure—initiated by the sister—to provide a “proper home” indefinitely, despite Grace’s financial independence and lack of contribution.

Enabling adult children often delays maturity, leaving them unprepared for shared living expectations like quiet hours or chores. While a few suggest clearer prior communication or formal rules, most agree that four months of unchecked behavior justifies pushing for change.

Broader trends show new parents increasingly guarding their space and routines, recognizing that extended “help” can become exploitation. Healthy boundaries benefit everyone—potentially motivating Grace toward independence without resentment—if framed around mutual respect rather than punishment.

Here’s how people reacted to the post:

Most users firmly supported the poster, urging her to enforce boundaries or evict Grace entirely.

Several highlighted the sister’s role in creating the issue and suggested practical solutions.

A couple called for clearer direct communication while still siding with the poster.

This family living situation shows how good intentions can sour when an adult guest refuses to act like one—turning temporary help into a burden on a household with a new baby. The aunt’s suggestion that Grace adapt or leave protects her family’s well-being, while the sister’s outrage reveals ongoing enabling of her daughter’s immaturity. Setting firm deadlines or rules now could resolve things peacefully, giving everyone space to grow.

Have you hosted a relative who overstayed their welcome or refused to help out? How did you finally draw the line—direct talk, eviction notice, or something else? Would you give a spoiled 28-year-old another chance with strict rules, or boot them straight away? Share your stories below!