Am I over reacting?

So Sunday my husband turned 21. For his birthday we went out to eat and he ordered a beer, I drove home of course and I was fine. He tried to buy it but alot of people at gas stations wouldmt sell to him till the next day (monday).. I'm currently 27 weeks pregnant, I have physical therapy three times a week and two children to take care of, along with household daily chores etc. Today's Tuesday and I just had another 1 hour round of intense physical therapy and I'm hurting, my legs feel like jello. My husband asked if I wanted to go to apple bees to eat and I said I didn't mind but I didn't want him to drink because I would have to drive our family back home. He goes off the deep end saying it's not going to be an everyday thing and he wouldn't drink every restraunt we go. Yesterday evening he came home with a 6 pack and drank three before going to bed, now he wants to go to applebees to drink a couple beers tonight too. He just turned 21. I told him if he really wanted to go then he could go with a friend but I was staying home that I didn't want to have to watch our kids at the table drive us home settle everybody into bed while he goes to bed because he's had a couple. Am I wrong for being upset? I don't want him to turn into an alcoholic. Like he still has beer here at home why can't we go eat then him come home and drink one before bed. Why does he have to show off that he's 21 and can buy legally at restraunts???

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