I put up a post about my pregnant molly and what to do with the babies a little while ago....but how do I know for SURE if she really is pregnant

??
I took everyone's advice, and bought a breeder box and put her in there. I also called up a local pet store and asked if they would take the babies since I do not have any room in my tank for any of them and they will!

So, I have everything set up...but now am second guessing whether or not she is truly pregnant!
...could be that I'm extremely impatient, and want to watch her have the babies..? I don't know..
Thanks!
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10 gal
2 platy
2 mollies
2 snails