Any advice appreciated!

So...hubby & I have a wedding to go to in 2 weeks & we have my brother & his girlfriend coming to watch our 9 month old baby girl. We're trying to find a way to get our little girl to take a bottle before bed instead of nurse so there might be some hope that they can get her to sleep. We've been trying to get her to take the bottle instead & we have a good bedtime routine down but in the end, she just cries until i relieve my husband & give her a boob.

Any advice is appreciated!