Is it normal to fantasize about your mother?
Mostly.Normal for most people
A taboo or unwanted fantasy can happen, and having it doesn’t mean you want to act on it or that it defines you. What matters is keeping clear boundaries in real life.
People can have unexpected or taboo fantasies, sometimes because the idea feels shocking or forbidden—not because they genuinely want it to happen. A fantasy by itself isn’t a plan or a verdict on who you are, and you don’t have to share or act on it.
Your mother is still a real person with boundaries, so keep the relationship nonsexual. If the thoughts are upsetting, feel hard to control, or are affecting how you relate to her, talking them through with a therapist could help.