AITAH for telling my MIL she can’t take her grandson for an entire day by herself?

I (f/30) had a baby 5 weeks ago and live long distance from my in-laws. My mother-in-law (MIL) is planning to visit next week to meet the baby and has requested to take him out for an entire day without me present.

The main issue is that the baby is exclusively breastfed and currently refuses a bottle, only wanting to feed directly from me. He is also very attached and gets upset when I leave him for more than a few minutes. Because of these factors, I feel it is too soon for him to be separated from me for a whole day, leading my in-laws to accuse me of being selfish and trying to keep the baby away from his grandmother. I am now questioning if my protective stance is unreasonable.

AITAH for telling my MIL she can’t take her grandson for an entire day by herself?

In the field of early childhood development and parental boundaries, Dr. Elliot Barnes is known for noting, “The biological imperative of a neonate often supersedes social expectations; feeding method and attachment security form the primary framework for early caregiving decisions.”

The situation presented involves a clash between a new mother’s established care routine, which is developmentally appropriate for a five-week-old exclusively breastfed infant, and external family expectations. At five weeks postpartum, an infant’s primary caregiver relationship is intensely focused on meeting immediate needs, especially feeding, which is inextricably linked to the mother in this case. The MIL’s insistence that the OP “does not know what’s best” dismisses the OP’s experience as a mother of three and ignores the established reality of the baby’s inability to take a bottle or tolerate separation.

The partner’s ultimatum further complicates matters by framing the OP’s protective actions as selfishness, shifting the focus from infant welfare to spousal conflict. A constructive path forward would involve establishing clear, time-bound compromises where the MIL can bond with the baby under conditions that ensure the infant’s needs are met, such as shorter outings or supervised time together, rather than insisting on an entire day of separation which is currently unrealistic for this infant.

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The original poster (OP) is facing significant conflict regarding the care and boundaries for her five-week-old, exclusively breastfed infant during the grandmother’s first visit. The OP feels she is acting to protect her child’s established feeding and attachment needs, while her partner and MIL interpret this as selfish control, demanding a full day alone with the baby despite the infant’s documented distress when separated.

The core debate centers on balancing the new grandmother’s desire for bonding time against the very specific, non-negotiable physical and emotional needs of a five-week-old infant. Is the OP justified in refusing the request for a full day separation based on feeding and attachment needs, or is she unfairly prioritizing her boundaries over the partner’s desire for his mother to bond with the child?