<human>: Can you succinctly summarize the text in 1-3 sentences?

Yesterday my boyfriend's roommate (37 m) asked me and my bf an interesting question which I have mixed feelings about. He met this girl who is 20 at a gun store (she is a cashier). And they seemed to have hit it off and have been together for 9 months. The roommate says that it has been going great and that she really likes him. 

However he feels like he is doing her a disservice. He has been divorced for 6 years and has two kids. His lady says she does not mind and has met his kids. Though he says that he cannot get over the age difference.

The 20 year old lady is working now and is also a college student. I have seen posts here before about similar issues, though it usually involves barely legal still high school girls, and the guy in question is usually hyped about banning a younger chick and thinks they are 'totally in love' after being together for only two weeks or whatever. I feel this situation is kind of different, maybe.

What do you think? Do you have any personal experiences or antidotes? Advice? 

I am 21 and bf is 27 and we have been together for 2 years if that matters at all.
<bot>: Bf's roommate wonders if dating a girl who is 20 while he is 37 and divorced with two kids is wrong. What do you think?