Ok....let me elaborate. The window had 6-10 of spades. My hole cards and hers didn't help. I think I had a 10 of hearts and a 2 of diamonds....she held a King of clubs and a 3 of diamonds.
Bet and make her fold her split-pot hand. If she would have called you would have split the pot. The highest 5 cards out of the total 7 cards plays.
I'd make a stab at the pot hoping that she'd think you have another spade in your hand for a higher flush.
But if you can't get a good read on the other person, check it down and split the pot.