let him know there's a new roadside roach motel down the road.
it's time for you to make the power plays, disillusioned. bitch-panties - find 'em now!
if you can't change the locks for legal reasons, just add one. you can say you felt the need "for additional security while living alone" and he just hasn't been there to get a key. perhaps if he'd notified you in advance, you could have had one made...but as it stands, you weren't expecting him. let him knock, get loud, louder, louder, yell, say crappy things and then call the cops and tell them you are scared.
have you talked to anyone he works for? you know, the military isn't real cool with the whole cheating on/dumping your pregnant wife and then newborn, especially to diddle around with a MOW thing.
talk to your lawyer, but can you also take this to the military? is there a chaplain you could talk to? or a family advocate? otherwise, you could submit proof to his superiors and they'll probably take care of him rather neatly for you.
it sure seems like the "stringing you along til D" comment and others like it would mean you could keep him out of the house. in some states his admissions to you in writing would be grounds for establishing abandonment...making it legal to change the locks and have him removed from the property if he tries to assert anything.
((((disillusioned12)))) i really don't want to see this douche walk back into your house.http://www.facebook.com/hardheadpress
life must be rich and full of loving--it's no good otherwise, no good at all, for anyone - j. kerouac