Clue (1)

"Since Simon invited you along to this party, he must really like you. We don't really let outsiders into our home but Simon vouched for you. Do we need to start picking out outfits for a wedding?"

"That's too much. I have not even thought about a wedding yet. I am enjoying getting to know Simon," Kate replied to the host of the party. She wanted to say she already had her wedding dress picked out but was trying to come off as if she wasn't crazy about marriage. 

If for some reason Simon was foolish enough to not marry her, Kate would play it off like she was never interested from the very beginning. However, there was a high chance she would wed Simon. It was normal that after a few times attending parties together, a ring would soon follow.