(In this alternate time line she wasn't killed and ran away, but rui still died but now she isn't bound to him enymore)

you walk away from rui's corps with Tanjiro. You are almost out the forest when you hear a voice

"Um.... h-hi"

its the spider mother but she is not hostile towards you two, instead she is peeking around a tree

"Sorry.... for killing, and controlling the slayers, rui forced me"