large bust adjustment question

I am working on a dress pattern conversion to maternity dress. DGD #1 is a 40 DD already and 21 weeks pregnant. The pattern we (ddil and myself) are converting is Simplicity 3785. I did the large bust alteration on the pattern and there is too much fabric lateral to the breast / from the breast to the side seam. Any body got any suggestions or conversation on the subject. I'll check back tomorrow. The first garment is a hopefully wearable muslin. I am wondering if her DD cup size is not accurate and I should have just adjusted for a D. Kaitlin. You do those adjustments. Is there some tweeking that you do after. the full bust adjustment. I recut the pattern and took about an inch out of the side seam. I'm thinking I should have taken about .5" from the length of the side seam and about .5" from the width. We havn't tried it on her yet.