The original poster (OP) has been in a long-term relationship with his girlfriend, whose sister has an intellectual disability, functioning around the level of a 13 or 14-year-old. While generally a good person, the sister faces challenges with employment and managing adult responsibilities, which the family has historically supported.
The sister recently married a man with a similar disability and became pregnant, motivated by the desire for happiness. The family supports this, even stating the future child could care for the sister later. The OP expressed strong concerns about the safety and responsibility of this situation, especially the expectation placed on the future child, leading to a disagreement with his girlfriend. The central conflict is whether the OP is justified in setting firm boundaries regarding future financial or parental support for his sister-in-law’s child, leaving him to question if he is wrong for his stance (AITAH?).

AITAH for drawing a line with my girlfriend about our involvement in her now pregnant and intellectually disabled sister?














As developmental psychologist Dr. Stanley Greenspan explained, “The challenge for parents of children with special needs is to balance the need for intensive support with the need to foster independence and avoid over-functioning that limits the child’s potential.” While this quote addresses the parents of the disabled individual, it highlights the delicate nature of planning for long-term care and independence, which is exactly what the OP perceives is being dangerously overlooked here.
The OP’s reaction stems from legitimate ethical concerns regarding the capacity for safe parenting and the transfer of dependency. When a family unit sets an expectation that a future child will become a caretaker for a parent (a concept often termed ‘parentification’), it places an unfair and potentially crushing emotional and practical burden on that child. The girlfriend’s admission that she would not feel comfortable leaving their future child with her sister for a week strongly validates the OP’s objective assessment of the sister’s current functional limitations regarding infant care.
The OP’s action of clearly communicating his boundary regarding financial and long-term care involvement is appropriate given the scale of the potential future burden. However, communication must be handled delicately within the partnership. A constructive recommendation for the future would be for the OP and his girlfriend to seek joint counseling to discuss their shared future financial planning and their respective roles as future aunts/uncles, ensuring their partnership goals remain aligned, separate from the immediate family conflict.
THE COMMENTS SECTION WENT WILD – REDDIT HAD *A LOT* TO SAY ABOUT THIS ONE.



























The original poster is clearly positioned between supporting his partner’s family autonomy and holding serious ethical concerns regarding the welfare of a vulnerable adult and an unborn child. He feels his core values about responsible parenting and future liability are being challenged by his in-laws’ decisions, which his girlfriend seems to accept without sharing his level of apprehension.
The core debate rests on where personal responsibility ends and family obligation begins in situations involving significant caregiving needs. Is the OP justified in preemptively drawing a hard line against future financial and logistical involvement, or does the expectation of familial duty override his personal boundaries in this unique, high-stakes situation?







