reginula said: "Valentina3, we don't live in NY (we'll be flying in from Mexico in June) and she felt it was best to join me than hanging around by herself in a city she's never been to. I told her she wouldn't like Book of Mormon but wanted to come as well. I'll let you know what happens. As for Great Comet, I figured I'd have some luck if I played her the BBC show. I hope that and the dancers hanging around her are enough to keep her amused.
Re: Great Comet, have you considered finding her a translation of the book in her native language? The section the show is based on is very short and not too tough to read (well, I guess mileage may vary on the latter point, but hey, even my mom got through it, so.). We're taking my mother-in-law to see the show in June too, and she speaks almost no English, but she's seen the BBC version and we're giving her that excerpt of the book in Japanese (her native language) and maybe a bit of brief explanation before the show, and with that, I feel like it's no different from being able to follow along with an opera in a different language and no subs. Will she understand every word? No, but does she really have to? She'll get the gist (more than the gist, really) and the spectacular visuals and singing, and that's plenty. All you can do for your mom is try to give her a little preparation, and you'll get the best experience possible.
Hope you have fun at all your shows!