GOT A SECRET!

So

I am pregnant and we can't wait to announce on social media. We are waiting for our first ultrasound.. my sisters sweet 16 is in November, so we kind of want to announce before the party.. we have a 3 yr old so this is our second baby... would it be crazy if we used baby #1 ultrasound to announce... I mean no one would know it's not current... it's just i don't wanna look "fat" at the party.. I wanna be known as pregnant and if you have family that judges your every mood and talks about you behind your back... we all got some "family" that is like that.. not all of it is like that but my moms side is so I rather they know and if there happy or not I can careless! I'm married, I have created a beautiful family adding baby #2 and I'm educated with diploma, my hubby works and we have our own place.. sometimes I think it's just hate on own family. But whatever! So what do you ladies think?? Should I use baby#1 ultrasound or no? Comment pls.