Those clothes are not likely to last much longer in either case, but Phillip isn't quite to the point where he needs her naked right this moment. There is a difference between knowing how to please a female lover and being on the receiving end of that, and he's intending to be quite thorough in giving her than experience.

He lavishes attention on her breast, pulling down her clothing enough to bring skin to skin. His other hand begins to work on discarding her coat, but that is much lower on than priority list than keeping them pressed up together and letting her feel the difference in how their bodies fit with her new curves.