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    Mother-in-law invites herself on family car trip, refuses to accept boundaries

    Author image for Remy Millisky
    Remy Millisky • Writer and Editor
    Jun 2, 2026 11:15 AM EDT

    This family road trip has just expanded, because this person's mother-in-law simply invited herself along for the ride.

    A family trip to the Caribbean sounds blissful! Soaking up the sun next to cerulean blue waters, snorkeling with your siblings, and even hiking to a waterfall. So much fun! This family is bound to make memories that will last a lifetime, especially since they're bringing along a large chunk of the family, including both grandmothers and a handful of teens. 

    As they say, vacationers want to get there fast, and then take it slow. Not the other way around. 

    This family seems like they're taking the long way to get to paradise by squishing every family member into one car, then driving together. 

    What should they do about the MIL who is encroaching upon their driving plans? 

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    • Mother-in-law shares snacks with her 2 young family members during a road trip stop, as 3 models display.
      via Andrej Lišakov

      Mother-in-law shares snacks with her 2 young family members during a road trip stop, as 3 models display.

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    • It'd be one thing to invite yourself on a family trip to the Caribbean, because that sounds awesome. But the MIL here specifically invited herself to the car trip part… why? Just why? 

      Instead of flying herself in to the destination, or even just renting her own car, the MIL really wants in on the car trip. It already sounds like this car is packed full. Maybe the family can split up into 2 cars, giving everyone a little more room to spread out.

    • MIL makes decisions that affect me

      My family is taking a trip to a Caribbean island where my husband is from. We are traveling with my mother and daughter and as soon as we land we are driving 2 hours away for a family gathering. My mother in law decided she would
      via Cautious_Bicycle_345
    • meet us at the airport and ride with us to the small town. My MIL has a car and can drive herself but doesn't want to. I didn't say much about her inviting herself in our car initially since it's just one other person. Now
      via Cautious_Bicycle_345
    • MIL snaps a photo of her 2 young family members, who sit unhappily in the car, as demonstrated by 3 models.
      via Andrej Lišakov

      MIL snaps a photo of her 2 young family members, who sit unhappily in the car, as demonstrated by 3 models.

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    • she worked in that it will be her and her other granddaughter (my husband's teenage niece). My husband tried to push back that they wouldn't both fit in the car. She brushed it off that he can upgrade the vehicle size or if not it's
      via Cautious_Bicycle_345
    • ok because they are small and would be fine. For context...my husband is sensitive to sound and becomes very irritated when driving and he generally gets irritated with his own mom. I usually can put up with
      via Cautious_Bicycle_345
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    • Teen girl sits uncomfortably on a long car ride with her family, as depicted by a model.
      via Andrej Lišakov

      Teen girl sits uncomfortably on a long car ride with her family, as depicted by a model.

    • her longer than him as she nags and repeats everything often (she's always been like that). My daughter gets anxious on longer car rides and when around other people she feels like she has to hold it in leading to exhaustion. and later meltdowns. My
      via Cautious_Bicycle_345

      Kudos to the daughter for being aware of her own emotions. It seems like she's strongly hinting that she doesn't want the MIL here either. All that nagging is really going to ruin the car trip, which could otherwise be a really pleasant experience. 

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    • mother and daughter will be uncomfortable driving with 2 additional people although they won't be the ones speaking up about it. My MIL and SIL (teen's mom) always do stuff like this to work in what works best for them and my husband doesn't
      via Cautious_Bicycle_345
    • MIL and 2 young family members go through their belongings during a car trip, as depicted by models.
      via Andrej Lišakov

      MIL and 2 young family members go through their belongings during a car trip, as depicted by models.

    • communicate clearly or set boundaries with them. I step in and then I'm the enemy. There was a situation in the past where I was so upset I had a panic attack so I'm afraid of that happening again and not enjoying the trip.
      via Cautious_Bicycle_345
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    • AITA for not being ok with this car ride situation? I'm sure there will be more surprises during the trip.
      via Cautious_Bicycle_345
    • Vacationers enjoy a Caribbean beach day, as depicted by models.
      via Anthony Ingham

      Vacationers enjoy a Caribbean beach day, as depicted by models.

    • For further context my mom is coming with us because she lives with us as she is blind and it's harder for me to find a caretaker than to bring her along. Also, she loves. the beach and I feel guilty for not bringing her.
      via Cautious_Bicycle_345
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    • Overall, I don't think she is not much of a nuisance, just has special needs but she is pretty flexible to the extent she can be. My husband is nice enough to bring her along on a family trip to see his family so I feel like an AH for appearing to
      via Cautious_Bicycle_345
    • not be grateful and flexible to his lack of good communication and setting boundaries with his family. AITA?
      via Cautious_Bicycle_345

    • This person had the perfect solution

      WorkingInterview1942 It's just too bad that the rental car company only has small cars that will only fit the four of you. MIL and niece will have to find another ride. That's your story and you and your husband should stick to it. Also talk to the rental car people and don't let your MIL change the reservation.
      via WorkingInterview1942

      Oops, they're all out of cars! What a shame! Guess grandma will have to get her own car. 

      No one would be to blame in this hypothetical situation. The MIL could steam all she wanted to, but hey, only so many people can fit in one car. She'll just have to find her own way there. 

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    • NaryaGenesis Tell your husband he can drive his mom and niece in his mom's car and you will drive yourself, your mom and your daughter. Or he can tell his mom point blank that she is not coming along and neither is niece and she can drive herself. He can choose which choice he wants.
      via NaryaGenesis
    • Or you can rent another car for yourself, your mother and your daughter but in all situations, the three of you are not ending up in the car with his mom. NTA
      via NaryaGenesis

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