Hi Reddit, I'm a fairly newish lurker and first time poster. I (29F) recently had a friend move to the same state as me and she has been staying with me on and off while she finds a place to live. She's a single mom and her son is currently staying with his grandmother in another state until she can get settled. She has always known that I want to live a CF life and I would even go as far to say that kids give me mild anxiety and the thought of me having them is fairly nauseating. (Okay, a little dramatic I know.) I hosted her baby shower for her and have always been good at gift giving for her and the son for birthdays and Christmas but have never once had the desire to procreate myself. She knows this and now that she has her son she will occasionally tell me "oh but you'd make such a good mom and you'll change your mind." In response to this I always tell her that I have no desire to do so and am perfectly content being CF. Just because I would be a good mom doesn't mean I should be if I have no desire to raise children. During her last visit she made an off hand comment and said that when she does bring her son down here, I might have to babysit. The thought of this is so unpleasant to me and I told her that I am absolutely uncomfortable with this idea. I feel bad that she is currently looking for work and has limited income and might not be able to afford a babysitter, but I am not a possible option. I pointed out that even as a teenager I have never once babysat for anyone and do not know CPR or basic childcare for her almost 2 year old who is still in diapers. Hell, I wouldn't even know what to do with a diaper nor would I want to find out what that entails. My biggest fear is that even though I put my foot down and told her no, I am worried that she will bring it up again and don't know how to reassert that that's not something that I can or want to do. I guess my main question here is AITB and what can I say (as nicely, but as firmly as possible) if she does bring it up again to let her know that my position hasn't changed and I absolutely will not do it?

TL;DR: AITB for telling my friend that I am not comfortable babysitting her child as I have never babysat before and don't like children myself?