Higher alcohol tolerance after having a child?

So I’m a month postpartum and decided last night that I was going to have some wine for the first time in about a year again. I never drank heavily before pregnancy, I probably had wine once every few months and say my tolerance reflected that. Since I hadn’t had it in so long this time, I expected to really feel its effects and to be honest was really looking forward to it with how long it’s been lol. I had probably 65% of the bottle in a short amount of time and felt nearly nothing! I’m at my pre-pregnancy weight too, just with less muscle. I’m also exclusively pumping if that makes a difference in tolerance. I dumped last nights milk just in case though. Anyone else experience this?