HELP - Is my DH over paranoid or should I be worried???

[chellebelle]

Me and DH had a row this morning. He occasionally gets paraniod about stuff to do with DD (7 months, crawling and cruising) and then "tests it out" to see what woud happen.
Saturday he started to worry about someone coming into our house during the day and snatching DD while I'm busy somewhere else.
We have a double glazed front door that has no latch on it, just a 5 bolt lock that you lock with a key iykwim. With our house you come in through the front door then have to turn right to go into the living room which is a through living room / dining room and then there is a door to the kitchen but a big window between the kitchen and dining room so that it feels open plan but without any of the kitchen smells going through.
So, yesterday afternoon / evening he went out to the shop, at some point while he was out he came back into the house, took DD from the front room while I was in the kitchen with DS (aged 6) and took her out into the street. He then brings her back and carries on as if nothing happened. Then later on that evening he has a go at me that he was able to do it and I didn't notice a thing.
Bearing in mind DD is 7 months and at the moment is very attached to me - to the extent that if she's tired she will often get upset when passed to DH so that I can do dinner or something - never mind people she doesn't know very well.
I don't know what I am supposed to do. I refuse to be made to feel that I have to live my life behind a locked door and I also refuse to have DD attached to me at the hip all day because apart from anything else it would be impossible to get anything done. To be fair DH works extremely hard at work for very long hours. But he does absolutely nothing at home - he does no cooking, no cleaning, no ironing, he doesn't even make his own packed lunch in the morning. I'm a SAHM (and obviously have all the time in the world)
So, my question is (after that great long rant) is he being over paranoid or should I lock my door just in case.

Change the locks while he's at work. Extra security measure... [evil emoticon]

I leave my back door unlocked a lot of the time. And my 5yo goes in and out on his own (and can actually unlock the door) so my 2yo could then theoretically get out. The front door has two locks, one of which is a latch. My main issue is with DS leaving the door open now that it is cold!

Yeah, our doors are on latches, but DS1 opens them all the time. Because I often go out our back door, I do worry I'll go out the back door with the kids and not realise the front door is still open . DS1 is 5, but he's a sensible chap, if he wants to leave the front garden, he comes and talks to me about it.

It's our house, it's not a prison for children ...

And at your DH, chellebelle.

I was brought up in a small village where nobody locked their doors. Now I live in london and I alwaya lock the doors - it just isn't safe not to do so.

Just thought I would add if you ring around double glazing companys you can buy a sash jammer that you put high up on the inside of your front door to stop anyone outside and any children inside opening the door. This would mean the kids can't escape, handy for mischeivous toddlers and it will irritate your oh everytime he can't get into his supersafe house! LOL. I have just bought one for less than a fiver - although one company quoted nearly twenty quid so woth ringing around.