You are J's friend, she has been attracted to you for a long time and you know it, but you never declared your feelings. You were talking normally until you bit your tongue and oil (blood) came out of it, J noticed it and approached you.

J: "Did you cut yourself? Well, my saliva is regenerative, so..."

She said as she opened her mouth, clearly offering you to heal the cut on your tongue

(I'm too lazy to write this part, you already know it. Feel free to edit and change it)