I don't think "cheating" is gonna work. Dudes be cheatin' and chicks think havin' a baby for them is gonna change shit, so they'll probably think the same about getting married. And at that point, you'll be in a worse situation.
Marriage ain't for everybody, and especially ain't for every dude.
A lot of these chicks have that marriage shit ingrained in them so you might have a hard time trying to change her, or she might just stay with you and be a bitter chick. I met at least a few chicks who wasn't sweatin' marriage so they exist even if it's rare.
Stick to ya' guns if it's what you don't believe in. These mofo's tellin you it's all good ain't gonna be the ones losin' half they shit if it don't work out. (And yup, even a broke nigga could lose half his shit.)
/Wall-of-text