My husband and I went out to an event at the weekend and his parents came over to babysit. They are mid 70s, our children are 4 & 7. We got home around midnight. The 4 year old went to sleep about 9.30 and my 7 year old was up later (not sure precisely).
When we got home at midnight, FIL was so drunk he could barely talk. MIL doesn't drink so was fine. AIBU to think that FIL shouldn't have done that. Yes there was still another sober adult but I just feel it was completely unnecessary. As the kids went to bed quite late I am certain he was drunk whilst they were awake.
For context in the morning there were 2 empty gin bottles and 1 empty tonic so basically he was tanking straight gin all night. Not normal or ok surely.