Great googley moogley!! @nikipedia! So nice to see you. It’s been an age.
Prior to adopting our daughter (at age one), she slept in a tiny metal crib, on a piece of plywood covered with a sheet, with two other babies — for the first year of her life.
So when we brought her home and placed her in a big, comfy, crib on her own, she slept like a rock (through the night) for years. It was heaven.
Then, when she was about four, we went to New York and let her sleep with us in the hotel bed. That was a horrible idea because, when we returned home, she started popping into our bed in the middle of the night and sleeping with us.
I really disliked it, but nothing worked in getting her back in her own bed. This went on until she was six when, one night, for no apparent reason, she went back to her bed all on her own, and never returned. Thankfully.