This may sound strange coming from someone you don't know but I feel compelled to suggest something I would do in the matter.
The truck as it is, is fast, heavy, loud, iconic and gets 9mpg which really is an impractical piece of machinery but all the more reason we love them.
Now that you are to become a father you feel as if perhaps the truck is impractical or unsafe. Family does come first, and it's best to be understanding and communicative in a relationship so I see why you want a resolution before the time is near.
I base my decisions on what my first attempts were. You bought an RC because you probably were more about the single-cab look and I feel that even later on, when you made that decision you felt it was the right one. So why go back on it?
I would maybe look around for a van or suv to replace the car as a man needs his outlet, his time too with his toys. It's not being selfish or wrong but understanding.
But of course, in all things you only make the choice based on what you think is best, and how you feel is the right choice no matter what anyone else says.
Congrats!
