Of the characters that haven't recently taken a driving test, I'd say Candice and [not pictured] Dr Amana.
Candice: She's got that motherly, wholesome, fertile look + salt-of-the-earth, tough farm girl (potentially tomboy) vibe. From a physical, evolutionary standpoint, that's also some good mating. Pops up thoughts of a tall glass of lemonade and an impromptu roll in the literal hay after some tough, sweaty yard-work where you've both gotten your hands dirty. If she already milks cows and is an option for the pregnancy feature, all the better. Especially if you've got a nice barn in the works and MC doesn't mind fresh unpasturized. Yes, that's exactly what I'm getting at. Fingers crossed you're working on a lactation feature because it looks like she could fill a few gallons.
Dr Amana: The wild inappropriateness of boinking your shrink. Even more trashy and wrong since here she is enabling the very addiction you've come to see her for. Worth it.
I'd probably have Emily up there if Candice didn't already share a similar body type + a face and style much more to my liking. Plus, you know, she's already your wife. Though there could be some fantastically kinky twists there as well. [Personally hoping for Emily's newly-discovered anal-loving sub streak with generous lube and plenty of "Yes Sir's" mumbled through her ball-gag for MC's (I guess literal) asshole route. Maybe in a maid outfit if she's jealous of Lupita.]
Edit: Just did a search for old Candice posts since I was curious about the character. Definitely like the new look 10x over the old bleached-blonde bangs & skin-tone of the original model. Well done! I wouldn't personally call her a bbw though. Unlike a motor scooter, I wouldn't be embarrassed if my friends caught me riding on her. More thicc than fat, imo.