So! Steve has this thing where he can tell when people are lying to him. If it's okay for him to be able to tell when your character is lying, or if you'd rather him not know, let me know here! It can be a blanket yes or no for all situations, or it can be on a case by case basis if you'd like to pick and choose the times that Steve can detect lies!
Also I'm happy to answer any questions about it!