Fess up to it like a man. Tell her: That's right, you cut up her sheets. You did it on purpose. It was your duty as a loving husband. Those sheets weren't good enough for her. She deserves better, something smoother next to her silky skin. Only Egyptian long staple cotton and habotai silk are good enough for her. Let her know that you couldn't any longer tolerate the travesty of these rough bedsheets touching her skin.