Okay, maybe it's just me thinking this, but why did you, or your husband, let her in? And why did you then give in and show her your scar? I'm of the mind that acquaintances, friends and family need to call before coming over, especially after this surgery. If someone drops by uninvited, it's up to you to decide then and there if you're up to a visit; if not, a polite, but firm, "I'm not up to visitors today so maybe you could call before stopping by again" will suffice. (or your husband could say that) Then softly shut the door. If people get a door shut on them without being invited in enough times, they just may take the hint. If they don't, it's their own problem. And you also don't have to answer the door at all just because someone knocks. I have a security screen door that is always locked so I can answer my door at will to speak to a caller, but not allow anyone in unless I unlock the door. Or, I can look out a window to see who it is and decide if I even want to answer. We will be getting one of those camera systems where you can see and talk with anyone on your property, after we move to our new home in the (hopefully) near future.
I don't like my scar being seen, so always wear longer things that keep it covered when not at home. If someone asks to see the scar, I generally won't show it, unless it's someone I want to have see it. I have had perfect strangers ask to see it after asking me why I need a cane and, with a scrunched up puzzled face, decline the show and tell routine.
My extension was really great for a while, but lately has gotten worse. I just figure this knee will eventually settle down and my extension will get better again, along with my bend which is gradually getting better.