As a longtime guest, you can go back to your own messages and find the posts to see what people have commented or replied, but there is no notification pop up for it like (I assume) there is for somebody with an account.
I think it's none of your business if a 19 year old and a 41 year old decide to date. (Also that's not even the scenario.) And no one ever answered Garlog's question. Why is it creepy to date young people? It's not like the dad's gf is incapable of decision making. It's as much her choice as it is his. If you find it creepy, don't date people with an age vastly different from your own.
(Age-7)2=max age
I think you're alright