I struggled with Brynne's swimsuit for hours! It just does not like this pair of boobs on her. No matter what I tried, it just would not fit around her new juggs without some poke-through. I even, eventually, decided to try manually morphing it with Mesh-Grabber, and it still wouldn't fit around them without poking through.
The problems were minimal, though, so I just gave up and fixed the small spots in post-work. :P