Farnese's activites

How is Rin not aware kissing ppl randomly like how she did to yokoi isn't normal?? I understand her other toxic behavior in the story so far but that excuse of not knowing iit's wrong to just kiss wthout consent just seems so sus? Like will/does that have any significance in future chapters or it that just a throwaway line and the unexpected kiss just to show how absolutely socially inept Rin is because of her isolated/alienated upbringing. Idk maybe I'm just reading too much into this but her brother is creepy and this manga is tagged psychological so...