Ultrasound question

Anna
I didnt do a gender reveal with my son and I kinda want to with this one :) my husband's family is all excited to find out so we've planned a little dinner to do a gender reveal. My question is what do i tell the tech? Last time she asked me did i want to know, she looked and told me boy and typed boy! On my my u/s print out to take home. If i say no i dont she wont, will she not look for the gender? Or can i tell her yes look and type it out but dont tell me? Lol how are you ladies getting the gender results to tell the 1 person who will know at your gender reveal? My sister is mine and im just trying to figure out to get her the info without me knowing lol 😁 Im also going in next week for the blood work to tell as well so im assuming i will know from that too. How did yall ladies do it for your gender reveal?