You will probably lose some boobage, sorry to have to tell you

But as Rebound said, it's different for everyone... I have noticed a few inches in the chest lost since January, but I'm still wearing the same bras, and I lost a lot more in the waist than the boobs. Inch loss can just as easily come from back fat as boob fat. And not everyone loses inches in the same way/distribution. There's really no way to know for sure!
Pushups/chest press may help compensate with pec muscles, I do a lot of those.