the birthday of my niece's boyfriend

Many people do not believe that I have a niece who is at the same age as with me, but I really do. And today is her special one 's birthday. She always wants to hold a suprise party for her boyfriend so she spent the whole morning to preparing a romantic scene with candles and a birthday cake. As a result, I am now staying in my room in order to leave space for the couple. However, After all I still have a piece of the cake so "Happy B~day my niece's boyfriend"