Lisa-Blue, you must tell us how you got into this pickle in the first place, did she see you wearing the full 9 yards? did she see you wearing panties whilst you were getting dressed or undressed? how did your wife discover your crossdressing, knowing these things we can begin to work out a possible way forward for you.
On the face of it Tracii G and Sometimes Miss have nailed the whole scenario but in any case from what I understand you have dug an almighty hole for yourself but as I say we do need to know more.