Ok so I found my old theory in a video comment from actually a week ago and here it is (and spoiler warning I guess):

theory: six does NOT become the lady. for example: why would six become the lady? she hates the guests as we see at the end of LN! plus how did she cure her never ending appetite? we never see the lady eat anything! part 2 whenever I feel like it

i hate chapter 5 its hard ._.

close to the end of little nightmares 2

the doctor be like