AITA for not wanting my sister and her children to move back into our family home?

A 28-year-old man moved back home a year ago to care for his mother after her serious health scare. He handles doctor runs, shopping, cleaning, bills, and more while working full-time as a pathology resident—allowing her some independence in a house she owns outright.

Now his 30-year-old sister, freshly separated in a messy split, wants to move in with her 1-year-old and 4-year-old boys. She’s job-hunting but struggling without childcare. Their mom offered to watch the kids, but he knows that’s impossible given her condition—and the real caregiving would land squarely on him. He’s ready to move out if they come, feeling guilty but overwhelmed.

‘AITA for not wanting my sister and her children to move back into our family home?’

The situation stems from the brother’s commitment after their mom’s health crisis and dad’s passing:

Then the sister’s separation throws everything into chaos:

He later clarified key details in an update:

This hits on classic family caregiver burnout. The brother has already sacrificed a lot—moving back, juggling a demanding residency, covering most bills—to keep his mom safe and comfortable. Adding two toddlers to the mix, especially when everyone knows the mom can’t truly watch them, would overload him completely.

Elder care experts often stress that one person’s health crisis shouldn’t cascade into exploiting another family member’s goodwill. The mom’s offer sounds kind, but it ignores her limitations and risks her own well-being alongside her son’s mental health.

The sister’s situation is tough post-separation, but relying on free family housing plus built-in childcare isn’t sustainable long-term. Better options include formal child support, government assistance programs, daycare subsidies, or short-term professional home care for the mom if needed.

Clear boundaries are key here. The brother isn’t wrong for prioritizing his capacity—he’s protected his mom this long by being realistic. A calm talk framing it as “I can’t take on more without breaking” could help, followed by following through on moving out if needed to force everyone to face reality.

Let’s dive into the reactions from Reddit:

The online crowd overwhelmingly sided with the brother, calling him NTA and praising his realism while warning against self-sacrifice.

Most emphasized protecting his own limits and the impracticality of the plan:

Many suggested practical ways to handle it, like moving out or a trial period:

A couple acknowledged the complexity but still leaned NTA:

One was just seeking info:

Pretty much everyone agrees the brother isn’t the asshole for pushing back—he’s already carrying a heavy load and being honest about what more would break him. It’s mom’s house, so her call, but consequences like him leaving are fair game.

What do you think—when family needs pile up like this, who’s responsible for saying no? Would you stick around or head out if extra duties got dumped on you?