SIL found out!
I was throwing up for two days straight so I thought I'd message BIL to see how his wife handled it. (SO told him last week.)
Well when I messaged him, I didn't know SIL had his phone! Oops.
She wanted to know how far along, when appointments are, how I'm feeling, all that.
Well we told her we are going to be announcing at their families Halloween party! Dressed as a construction worker (SO) and a road with a "bump ahead sign".
So she chimes in with her husband and her should be aunt and uncle for Halloween and I just had to mess with her and say, yup that's very scary lol.