My friends (many of whom are in my bridal party ) asked to host our engagement party. I asked them to include my fiance's sister in the planning because she is also a part of the bridal party and since she doesn't know many of my friends I thought it would be a good ice-breaker. BIG mistake!! She has convinced my fiance that the engagement party is supposed to be done by the bride's parents so he is now wanting us to host it ourselves. Isn't that in poor taste? And how do I handle this?