Easy fix. Make all marriage candidates into the wizard. Scratch that-- make every NPC into the wizard. Wizardew Valley.
The problem with adding marriage candidates is that they need extra scripting and dialogue for this. Plus extra sprites. So it'll need some work.
You have some competition. (in the game it is coded that Marnie wants Lewis, and Marlon, the adventurer guy, wants Marnie... So if you want Marnie too, we end with a full-blown love-square... or something like that).
I have the female wizard mod... It's tempting, but unless she can put on a nurse outfit in bed, I'm still going with Maru.
Guys there IS a thread working on adding characters as marriagable options and wizard has been completed and posted already http://community.playstarbound.com/...ard-now-available.109678/page-12#post-2866685
you can make ANY character into a datable NPC with a few simple changes... including kids .... you can also make them pregnant .... if... you REALLY want that for some reason... problem is that changing that will be very broken in that the character wont have scripted events and dialogue as they are per NPC basis. adding that dialogue wouldn't actually be too difficult, but adding events where NPCs do fun things that build up their personality is. Non the less, certainly not a hard mod to implement.