Go for it.
I'm 42, I know it?s possible. I got a HB7 girl home last sunday, she was a 24yo Russian. Got her top off and if I wouldn't heavily suspect she was having hygienic problems (as in: monthly problems) it would've been a SDL in a 3 hours timeframe. Once did a SDL with a girl 18 years younger. These things happen. Not every day though. Maybe not every month even.
Two reasons to go for it:
- get it behind you, either this works out or not (don't give you a high chance but still) but you know where you stand
- ability to look at yourself in the mirror and tell yourself you did what a man is supposed to do
Whatever happens: your excerscise is to take it well. Don't take rejection as rejection but as 'obviously she's not in the life phase or conditions that makes this work out, which if fine'. She's fine, you're fine.