Yes, if your mother is experiencing anxiety, it could cause her to make remarks that bother you. VP, if she says something that bothers you, calmly ask her to clarify. If she says she didn't mean it that way, then accept what she's telling you.
Not every remark she makes has a hidden meaning. Maybe she's just feeling hurt about the way your family is treating her. Try reminding yourself that she has troubles and anxieties of her own; maybe that will help so you will be able to let go of your own anxiety about what she says to you.