I doubt she was offended but in case you are seriously stumped why MM might be offended...calling them meat curtains in the presence of other women (or not) is vulgar at the least and a little offensive as is any meat themed female body part, and no, being offended does not mean anything about anyone's vagina as a normal labia has a variety of shapes and sizes.
http://i42.tinypic.com/2akhic9.jpg