I do feel uncomfortable, yes. But for my mother to have reacted the way she did, she must get pretty damn uncomfortable over moral violations, too.
While I can confront people over crossed values, I don't tend to push my values onto my friends or those I live with. For example, I have some pagan friends who like to get drunk. Both of those things make me uncomfortable, and I have mentioned that I am religious and that I do not get drunk (one knows it's for religious reasons), but I'm not going to shove my values down their throats at the expense of our friendship. I had a lesbian roommate when I first moved up here. It did make me uncomfortable, and I'm glad I learned before she mentioned her girlfriend, which gave me time to react in a safe space and not put my foot in my mouth. But I would never have shoved my beliefs down her throat. I happen to like having a peaceful household. And lo and behold, I'm not exactly straight myself. Ha.
Also, not everything is universal. For example, I typically do not drink, and I chose not to have any alcohol for years. Not getting drunk is definitely a religious thing, but the Bible doesn't say that alcohol in moderation is sinful. If some personally choose never to touch a drop, that's fine. If others choose to drink responsibly... well, it does make me uncomfortable still, but they're not doing anything that I would consider actually wrong. I don't get pissy about it unless people try and use the Bible to tell Christians (or others) that they cannot drink at all, which I consider absolutely wrong. Back when I was more against premarital sex, I thought it was wrong, but I recognized that the majority of people don't care what I think and will do it anyway, so I think that for those people, they need to at least be completely honest with each other about what they want and what they are giving. I actually don't have a problem with moderate swearing, but I recognize that some people do, so I try to be careful when and where I do it, and I feel that others should do the same. I actually said something to a friend in high school because she used the word "whore" in a pizza shop, and there was a mother with a young kid well in hearing range.
And sometimes, it really just depends on who's saying (or doing) what to me. A joke from a friend, even a nickname from a friend, is very different than that same thing from someone who pisses me off (especially if they know they do) or someone who I don't see as close enough to get away with that sort of it.