if the lease contract stated that the contract is till 11月尾到期, then she has the right to ask you pay the rent till 11月尾.
for your question-
我想問佢會唔會因冇俾佢睇樓(2nd & 3rd) , 佢可以搵藉口扣我哋d按金
answer is NO
the landlord has no right to bring visitors to your home
收樓果日我有咩要提防佢搵d 冇謂藉口扣按金
-the condition of your flat, any damages, e.g. broken tiles, wallpapers tear, toilet no working...
she can find excuse to 扣按金. if so, you can hire 'gung jing hong' to inspect (but the fee to hire this expert maybe higher than your 1 mth rent)
i rented a brand new flat before, my puppy's nails scratched the wood tiles which made the tiles condition bad. also the garden of the flat was soaked with water due to I didn't drain and clean it for a few mths. the landlord is kind and didn't 扣按金.
so it all depends on the landlord.