Husband knows gender, I don’t!

I am due for my third baby in early December. I have two boys already, one is nearly 9 and the other has just turned 2. I found out the first time I was having a boy, and the second we wanted a surprise. This time I really wanted to know, and my husband didn’t. So we had our 20 week scan today, and we told the sonographer that we didn’t want to find out the gender (😩) we had a trainee completing our scan and when her supervisor came in to check how things were progressing, a screen came up with all the information the trainee had collected, they quickly closed the screen and I didn’t think anything of it. Apparently, the gender was written there and my husband read it. He really didn’t want to know and now won’t tell me even though I desperately wanted to know! So ladies....help me out! What do you think this little one is going to be?!