I'm 31 and this happened last year after my Mom passed away.
Dad and I were devastated. We lost Mom out of the blue with no warning. I cried for days and I know my Dad was worse off than me. Mom was such a free spirit, always happy and friendly to everybody she met. I was always told that we looked near identical other than our hair (I keep mine clipper cut and natural brown, she dyed a platinum blonde and long/curly). We both are 5'6" and similar bodies.
About two months after Mom passed I was having a Sunday dinner with Dad. He was crying and telling me how much he missed her. He told me how the smell of her perfume always made his heart race. The sound of her laugh filled him with joy and even shared that making love to her was the best feeling in the entire world. It hurt me to see him hurting so much and I tried to think of anything I could to make his hurt go away. Laying in bed later that night I came up with what I thought was a perfect plan. After a quick late night purchase online I was ready to do my best to help Dad heal from our loss.
I called up Dad's best friend and asked him to take Dad out for a few hours the following Sunday. I waited down the street from his house. Once I saw them leave I went to work. I let myself in and went straight to the bedroom. Over the next half hour I dressed up in Mom's clothes, put on my newly purchased blonde wig and applied makeup just the way she did every single morning. The final touch was a few squirts of the perfume that Dad loves so much.
Once I was "dressed" I dimmed the lights, put on Frank Sinatra (Dad's favorite) and waited. When he got home I heard him call out "Jane, are you hear?". I replied "No honey, she's not here. It is just me waiting for you." I walked out of the bedroom. He looked shocked. "What the fuck is going on?"
I brought him a drink. "Dad, I'm only going to say this once. Tonight I am Mom, your wife. I want you to say goodbye to me. Tell me all the things you feel you never said. Do all the things you wanted to do for the first or last time. Forget who I am for tonight. Tonight only I am Corey, I am not Jane. I want and need this as much as you do. Make me your wife and say goodbye. I love you."