Alright so my husband decided he was going to do a huge favor for his brother so my brother in law's daughter can spend one more night at home with us, because if not for this favor my brother in law would have had to take our niece back to her mom's house. I don't mind whatsoever that he's doing his brother this favor, I love our niece and I'm so glad she wanted to spend one more night here. Then came the moment to figure out the car seat situation. By that I mean that instead of moving 1 of her 3 car seats that are already adjusted for her and here at home for our niece into our vehicle, he decided that he would readjust our 1 year old daughter's only car seat to an almost 7 year old. Which our niece didn't really seem to fit properly into our daughter's car seat, her head seem to surpass the top of the car seat by a good 2-3 inches. I voiced my concerns to my husband by literally just saying as calm as a cucumber, "Wouldn't it just be easier if we put one of her 3 seats into the car instead using our daughter's only seat? I mean they're all already adjusted to her. What if there's some type of emergency? We would then have to struggle readjusting her seat to be safe and comfortable for her again. I'd just feel a bit more comfortable if we kept our daughter's seat ready for her." At first he said that when I put it that way it makes sense, but then snapped at me calling me a dumbass for making him worry about our daughter when he didn't actually have to, at that moment. He claims that he only snapped because I gave him attitude, which I didn't until he snapped at me. I'm torn up here and my heart is hurting, I was only concerned about our daughter since that's her ONLY car seat where as to our niece has 3 already here. Was I just over thinking this and being out of line?