ditto pps with the suggestion of setting anything coming your way aside for later.
I threw my sister a bridal shower and was newly engaged myself. If the conversation veered in the direction of MY wedding instead of hers, I gently steered it back to her. If they persisted, I just nicely explained that I was trying really hard to be sure that the focus was on her and her big day instead of mine but we could chat after the party if they wanted to. Nobody seemed offended anyway.