Dumb Question 😅🤣

So I have my gender ultrasound in a few days, my fiancé and I are having a reveal party so the only person we want to know is my mom. Only problem is she won’t be able to make it to the appt as she has to work. I probably should’ve mentioned this at my last appt to my dr so they knew already but I forgot so when I go in how do I tell the ultrasound tech that we don’t want to know but would like something to give my mom so she can know obviously? I hate springing things on people last second so I didn’t know if this is something ultrasound techs are used to or if I should’ve said something ahead of time to not make things more complicated for them. 😩