Of the two dozen or so women I have known who have children with men they are not married to EVERY SINGLE ONE OF THEM was offered marriage by the man, they REJECTED them. It was a biased sample, to the extent that they were all college educated, but the assumption you are making, that women with bastard children are unmarried because the man didn't ask them to marry, is antiquated, in my opinion and contributes to the general man bashing that has gone on for the past two decades.
With the way Levi acts, I seriously doubt he wanted marriage.
Of all the teen fathers I’ve seen, you can pick the rascal who’ll run easily enough.