What would you think if I screenshot my mom's texts and showed them to my friends?
Are you looking for an outside opinion?
I'm curious if she reads my text messages and I want to know what she thinks about them.
I personally don't think it's ethical to share texts that were meant only for you. Can't you tell if she reads them by her responses? If not, why don't you just ask her?
I'm ready to nut up and accept the consequences of what my friends say about her.
Although you shouldn't share personal family matters with others, it is up to you what you do with the texts. You shouldn't want your friends to see your mom negatively. You should give your mom more respect.