I'm sort of in the same boat. My mom didn't really care with regard to my gun ownership, never really said anything with regard to me concealed carrying. Being fairly young myself (26 years old) and a bachelor she likes to visit me in SC from VA. Last summer she decided to have my niece and nephew visit her at home in VA. Her plan was to pick up my niece and nephew in Jacksonville, FL and drive them back to VA. Since SC is in between she decided to stop at my place in Charleston to avoid having to drive ten plus hours back to VA.
The only problem with that is that I was not at home at the time. I travel a good bit for work and the time when she was planning on stopping was in the middle of one of my trips. So being a single I don't secure my weapons in a safe and my loaded carry weapons are left in my nightstand drawer. She doesn't know how to safely handle my guns and now she is bringing kids into my house. So I ask my roommate who also owns guns to go into my room and unload all my weapons and lock them up in their cases. He also put all the cable locks on my long guns to include my AR. My Mom is very OCD and will clean my house and rearrange things to her liking if she gets a chance. Because of that she discovered my AR and suddenly started to have issues with me owning guns.
So now almost everytime I talk with her she tells me that I need to sell my guns and that only bad things happen with guns. This does not bother me primarily because of how I know how stubborn she is and thinks that only her opinions are right. She is so set in her ways that she still thinks the only way I will ever be successful in life is if I go to Med school and become a doctor. So anytime she brings up the getting rid of my guns and going to med school I just tell her no I won't and don't even try to argue with her.
Her sudden antigun thoughts were only brought out when she saw my "scary black rifle" as a result of an irrational fear she has with "military looking rifles".
RugerSRGuy I feel for you, although my Mom has never gone and thrown a temper tantrum with regard to my guns. All I can say is if you don't live at home and you are supporting yourself then she really has no right to tell you want you can and cannot do and you do not need to justify exercising your rights. In my Mom's case 99% of the stress in her life is stress she brings onto herself through constant worrying (not including my guns or lack of urge to go to med school).

