Father in-law is boarding with us and keeps fire arms under his bed despite our specific requests to have no fire arms in the house. All gun related opinions aside, he has repeatedly ignored this rule

Father in-law is boarding with us and keeps fire arms under his bed despite our specific requests to have no fire arms in the house. All gun related opinions aside, he has repeatedly ignored this rule to the point where our 15 month old found a firearm and he truly didn't see what the problem was.

Edit: [Thank you all for the overwhelming response and all of your comments and messages. Your expertise, advice, thoughts and concerns are truly much appreciated. I will endeavour to get through all of them and hopefully be able to update you all on how things progress in good time. In the mean time the guns have been removed and I believe FIL now realises how disappointed we are and seriously we are taking this.]

Around 8 or 9 months ago, my Father in-law sold up and moved cities to be closer to us and his new grandchild. My father in-law had asked if he could move in with us, the intention being to live with us for a few months until he found a suitable house to buy. No worries, an extra pair of hands won't go unnoticed and it would be fantastic for our son to have his grandfather around (not to mention keeping my better half happy).

For the record my Father in-law and I have always gotten on about as well as one could hope, as long as his daughter was being well looked after and she was provided for and happy, he was happy. Other than the odd disagreement over the last 10 years, no real issues, so moving in truly wasn't a concern.

Now we genuinely only had a few minor rules per say when he moved in, the most important being no firearms in the house. At the time he grumbled a wee bit, but ultimately organized to keep his gun safe at a hunting buddies place. No drama.

Now I'm no lawyer, but my understanding at the time was he had strict rules about notifying the local police that he had moved cities, what guns he had and where/how they would be stored.

Our house was not the listed location, nor do we have a gun safe on site, so my understanding was that on top of our request, absolutely no guns should be stored at our house full stop.

Fast forward around 3 months, Father in-law had a hunting trip planned and given the early start, decided he would keep his guns under his bed over night. No incident on that occasion, other than a discussion about respecting our wishes. At this point, while my better half and I are unanimous on the rule, she feels I'm being a little unreasonable as it was just over night.

The guns would have been dropped back off and safety locked up at the aforementioned hunting buddies house, except my Father in-law seemly decided to keep a rifle under his bed.

Evidently this rifle never made it back to the gun safe and around 3 months after the hunting trip, somewhere along the line, our 15month old wandered into his room (off the lounge, not uncommon for the doors to be left open in an otherwise well baby proofed home) where he came across the rifle butt sticking out from under the bed. Upon following him into the bedroom we were shocked to find he had pulled the rifle out from under the bed and was inquisitively playing with the business end of the rifle.

As any parent could attest, we were most upset and ultimately furious with my Father in-law, who not only didn't see what the problem was but had the nerve to then lecture us about how unreasonable our gun rule was in the first place...

Since then, he has had guns dismantled out on the dining table for maintenance and had guns on his bed for an afternoon or so, but not over night or actually kept in the house for more than a day.

All of which, to him, doesn't break our 'rule'.

Now, bringing us up to date, we have our brother in-law staying and needed some spare bedding out from my Father in-laws bedroom and upon pulling a spare blanket out, what should come with it but a big old rifle. No case, no trigger lock, and most certainly not in a gun safe. How long it's been under there we don't know, and given the previous incident, it's a wonder our son hadn't come across it again.

Yet to have a face to face, but my better half and I are really stuck on what to do. He clearly has no intention of respecting our wishes let alone the potential gun law issues with lack of proper gun safety. We are torn because we would ultimately hate to have kick him out, but really feel like we are in a position where we might have to.

The safety and well-being of our son is paramount and it truly feels like my Father in-law can't take gun safety remotely seriously enough.

Now my question, if anyone makes it this far:

Because we have no formal agreement and it's more of a boarding situation as opposed to a tenant & land lord situation, if we were to ask him to move out and he refuses (not an unlikely outcome) what could we actually do to enforce our request and where would that sit legally?

If I may, as a second part to my question: As far a gun laws go, is he breaking any laws by keeping fire arms at our house, not in a gun safe or at the agreed location, and not letting the local police know? Worst case would any of that legal responsibility fall on us as home owner?