Once they actually got there she tugged the bottom half of the gown down and set it quickly aside, undoing the front section of the bodice before tossing the mask to the bed and lifted her hair up. Has he ever seen her so hurried? Probably not in a good manner actually. "My darling, be as... swift as you can with it."
There may be the faintest of cracking in her words, a sense of fear. Not at the pregnancy possibility itself. But at the idea of if she is, the corset could cause harm no matter how early on. It was the last thing she'd ever want.