You press home your advantage, telling her that you are completely horny and desperate. You can't wait any longer to have her! You say the split second that your cock is in her pussy, you'll be totally unable to stop from fucking her! You beg her to please let you do this!
Your begging has the intended effect on Sydney, and she gets totally turned on! She fingers herself to an orgasm while you watch.
You can't help but grab your cock and stroke a bit as you see her get herself off...