"Gun proof your kids, don't kid proof your guns"
+1, if a round is not chambered, that 1911 is no danger to your child. I have raised 7 kids around guns, watch them, teach them about them, but do not put you or your family in jeapordy by putting a lock in them. Instant fingerprint recognition safes are great, do not put trigger locks on them.
Don't nag him, thank him for caring enough to protect you and your family. I would suggest you taking some classes with him, or even alone, such as the Women's Only Class that TDSA offers. It is only a day long and pretty cheap. If you are interested and don't want to go alone, my wife will go with you. She has been wanting to go too. Education is the key, don't overreact. Good questions though!!