Only solution I can think of is that you have a wooden spoon. Whoever is holding it may speak.
I think my DH's cousin's wife takes the biscuit, though.
Cousin got in touch after losing contact for nearly 50 years. Invited us to go and stay for a few days.
DH and cousin had a great time catching up on memories and family stories, which left me with the wife. I can talk but am mindful to allow the other a chance to speak, thus having a conversation. The wife didn't stop talking. It was non-stop. I tried to put in an odd comment, but she didn't stop.
We all went for a walk, the lads up ahead and me with the wife. I got a little out of breath, wife is talking, talking, talking. I decided to slow down. Wife is still striding on, talking like there is no tomorrow. Took her nearly 5 minutes to realise I wasn't with her.....
My DH apologised for leaving me with her, which, to be honest, I didn't mind because he was so pleased to meet his cousin again after so long.
Sadly, because of her, my DH refuses to visit his cousin or meet up because of the wife.