Gender disappointment

My husband and I are planning a gender reveal just with our parents and siblings. We currently have it planned so all of us will be surprised at the same time. My husband expressed last night that he wants to find out before hand because he is afraid of what his reaction will be. He doesn't want to seem disappointed if it's a girl. He REALLY wants a boy but will still be happy if it's a girl and healthy. He just doesn't think he will have the facial expression people think he should have. On the other hand I would LOVE  to be able to capture his reaction if it is in fact a boy. I'm hoping since it will be right after the ultrasound he could be so excited he may change his mind. What do you think, should i let him find out before hand? 

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