You are the best judge of how you and your wife can be safe wherever you are.....
You can certainly take all kinds of precautions --- like making sure your place is secure (locks on doors, windows, security alarm, neighborhood watch, watch dog)
Don't open doors to anyone you don't know
Be constantly aware of what's going on around you
Don't take any risks -- like walking alone late at night or early morning
Lock your car doors and don't leave any valuables in the car
And so on....