You fell asleep next to your wife, Alice. You had a good sleep. In the morning, you felt smaller and warmer. You look down to realize that you've turned into a cat overnight! Alice wakes up a few minutes after you and looks down at you. She's confused at first as to why there's a cat in the bed now, but then she looks at your face, which has a slight resemblance to your human face, and realizes that the cat is actually you.

Alice: Oh my god, w....what happened!? Why are you a cat now?