Lots of good replies, and even those challenging questions from Dave.
#1: SAFETY. If you've never had the bedroom door kicked in at 5 A.M. by a husband who drove all night to see his honey, you've missed an experience you only need to have once in your life. Just be bigger than the guy, and make sure he's got no guns. Tall order, huh?
(Oh, yeah -- I felt so responsible for busting them up, I married the b----- and she did it to me, too.

)
That's what hotels are for, you fool! You were lucky if you got away with this one time at the house.
Do your research. Don't let her know your address. Get a disposable cell phone (and get her one, too -- yeah, I know, that could end up being a tip-off, too.) Take alternating routes to any rendezvous, park her car, and then drive yours to the hotel. Be prepared to deny everything.
Sheesh! Lotta work. But I can see how tempting a "Tica next door" could be.
"Late at night, a big old house gets lonely.
I guess every form of refuge has its price.
But it breaks her heart to think her love is only
Given to a man with hands as cold as ice.
You can't hide your lyin' eyes..."