Yes, her titties got bigger because she put silicone in them and after that she got pregnant (that's an undisputable fact).
But we have to consider another thing: formerly, this girl used to photoshop almost everything on her pics (tits, ass, waist and sometimes even her husband's cock).
I remember that the first time I saw her pics on Tumblr (some years ago), at the same time, I was ecstatic and very impressed with her curvy and unique body... Until I found an amateur vid of her and see that she's not exactly the girl she shows up in the photos.
So, I think that explains why sometimes there's a considerable difference between her breast size in a pic to another, and that's not due to an eventual BR.