I can see Bertie eventually marrying a woman approved of by Jeeves...

Actually I had an idea for a short fic I'll almost certainly never write, about Bertie marrying, his wife dying soon after in childbirth, and Bertie and Jeeves living as a sort of couple after that (it wouldn't look so odd to other people if Bertie was a widower, I guess).

Or of course Bertie could do what Watson probably did and marry for appearances while cheerfully carrying on his bachelor lifestyle ;)