"Normal" is such a weird word. What's normal for one person in one place is strange for another halfway across the world. Or even across the street! It sounds like you're worried about your mom having done something inappropriate to you in your preteen years, and maybe battling with the idea that you should feel guilty or ashamed about it. Does that sound right? Just from what you tell me, I don't think she did anything wrong. I come from a background where that kind of thing would be abnormal, but hair removal also isn't part of my religion or my family's personal concerns. (My best friend actually had to teach me to shave my legs, since my mom never even brought it up with me lol!)

Instead of worrying about whether you SHOULD be worried or whether it was "normal", try to focus on how you feel about the incident now. Does it make you feel uncomfortable? If so, embrace that. Work through it. Maybe even bring it up with her, if possible, and let her know that it makes you feel weird to think about it.

If it doesn't make you feel bad to think about, then let it go~ Release the thought into the void of the past and focus on making better memories with your family in the present and future.