Should I be upset by this comment?

I get triggered pretty easily by my MIL so I need some unbiased opinions on whether or not I should be upset or just let it go.

My family lives in the States and I live in Switzerland with my husband. We live about 10 min. away from bis parents so we see them every Sunday, sometimes Fridays. All this time that I spend with them does make me miss my own parents but I’ve gotten used to it. It’s been three years now, so I’ve had time to adjust.

I’m having my first baby in December! My husband and I are very excited. My mom will be coming for a month in January to help me mentally and physically with the baby. My midwife was happy to hear she would be coming by.

My FIL asked for the dates she will be here (he is planning a retirement party for himself). When I told him the dates and that she will be here a month, my MIL reacted quite astonished and said, a month?! Isn’t that too much?!

I just looked at her. I didn’t know how to react and I didn’t want to make a scene if it wasn’t a big deal, so I just looked at her and said, no. Then looked at my husband and he just bowed his down over his plate of spaghetti, avoiding eye contact with me and his mom.

If you were in my situation... having a baby for the first time, an ocean distance away from your mom, would you be upset? It seems like such a little comment but when I look at the overall picture (FTM, family far away) the small comment my MIL made hurt... I don’t know, maybe it’s just pregnancy hormones...