Why is it in the te form?

I was listening to an n4 test and the girl hits me with a "すみません、ここで座ってもいいですか？" like, shes asking with the imperative form?? What?? and im like: YOU ARE ASKING TO SIT ON A CHAIR, WHY ARE YOU COMMANDING YOUR SELF TO SIT IN YOUR OWN QUESTION? "oh its the te form, its used to chain adjectives togheter" WHAT ADJECTIVE? THERES ONE ADJECTIVE AND ITS NOT MARKED BY TE.and as if it wasnt enough she marks it with mo too, like, wtf is the literal translattion supposed to be?? "Excuse me, is it ok to sit here TOO?" Whats that supposed to imply? Thats shes so fat she occupies two seats??