I would seek a professional opinion on it Pinkie, they're less likely to have the protective parent instinct and have materials about how honest foundations are key to trusting parents & having a tightly connected family. There are a huge amount of resources online too:
https://www.dcnetwork.org/telling-your-child
https://www.mercatornet.com/articles/view/the_pain_of_anonymous_parentage/
https://parents.berkeley.edu/advice/parents/fertility_explain.html
https://www.abc.net.au/austory/specials/howimetyourfather/vartahowtotellchildren.pdf
Ultimately it's your decision. The psychologist asked us to think about this:
ask yourself if you're basing your decision on grounds of fear, shame, or self protection, or are your interests for the well being of this person you are bringing into the world. And if you chose not to tell and they find out when they are an adult, what's your plan to deal with the aftermath? Are you willing the risk of a permanent fracture in your long-term relationship with your child over this?