If I end auction earlier will I scupper my chances of selling a matching item?

[mygirllollipop]

I have two matching bridesmaid dresses on ebay ATM.
With 8 days to go I have 3 watchers on the smaller size and two on the larger sized dress.
If I end the auction early on the smaller dress to one watcher, the other two watchers could be the two watchers I have on the larger dress? and might have wanted the pair?
Do you think I am scuppering my chances of selling the larger dress if I end the smaller dress early?
TIA.

[MrsMagooo]

I would add BIN's instead of ending early personally.