I have to plead guilty to many similar exploits.
Pushed new baby to local shops in pram. Half way home I thought that my arms should be busier..... I ran all the way back to find baby happily snoozing outside the shop.
When this baby was about eight, we drove to a supermarket with its sibling, parked the car, shopped, then younger child and I began our drive home. "Mummy, shouldn't we have collected X and the shopping?" said my little one. I had asked the older child to stand guard over the heavy shopping whilst I brought the car round. Not a good mother.... My eldest began to think that I had a vendetta against her!
I have left a handbag full of passports, travel documents and money on the 'plane, only realising when queueing for Passport Control. I managed to retrace my steps (that was c 25 years ago and I would hope that security is better now!). The cleaners beamed and knew immediatey what I wanted. I was very fortunate to have honest aeroplane cleaners.
I baked a cake for Guides and loaded up the car with children, etc. On arriving three miles away, the cake was still in its tin on the car roof. I must be a reasonably smooth driver.....
I have left handbags on hotel dining room chairs all over the world (I just walk out after breakfast, forgetting the hanging bags) and never had anything stolen when collecting the bag
There are umpteen more but that's enough!
OP you are not alone!