I just need to rant, so I will try and make sense, but I'm shaking and furious.
FIL is staying with us for a while, and house/dog sitting whilst we are abroad. His ex wife (My MIL) warned me about him and warned my partner not to leave me alone with him, his sisters have also warned me about him. He has mental health issues and as my partner described 'crazy' ( I think he was joking, but not joking at the same time).
They arrived from the airport at the weekend, chatting away and woke the baby up, I asked them to be quite, they didn't and baby stayed awake until 10pm, I was fuming. Just shut up when I'm trying to put baby back to sleep! It's only me and my dp at home, so bedtimes are quite and calm, I was told he needs to sleep in noise, which he does in the daytime but not for bedtime. So, that didn't put us off to a good start. He had just arrived in my home and I think I deserved a little more respect.
The next day, again, bedtime I asked for quiet and sat down with the TV on snuggled up to my LO. (I had been trying to get him down for an hour before i had given into the TV). All throughout this he was watching videos on his laptop, loudly, I asked my dp to ask him to turn it down, and he did, barely. He did the same again last night, dp was busy so I had to turn him down. He didn't like that.
Then it came to a heads last night, I'm very nervous about leaving the house and my first big trip abroad with the baby, so I was trying to go over all things with the house - shower dripping, please do it up tightly - ant problem, please keep things clean and food away. General bits. I then mentioned, if anything big happens, you must contact real estate/landlords. He refused, saying he will have nothing to do with them, I said fine, but let us know and we will tell them. Again, refused. This upset me as it's a rented house, so its their responsibility. I tried to reiterate the point when he just said 'stop, enough', completely ignoring me. Now, if it has been my partner, his son saying this, he would have listening. I walked away, fuming at both of them. I spoke to my partner and said he has to support me, he agreed and apologised.
Oh, and he has also moved all my washing off where I've had it drying onto the stinky dog sofa, as it was in his way of where he wanted to sit (it wasn't)
Today, FIL ignored me all morning. He. Is. So. Rude. In my own home, we have paid for him to come over, and I'm fuming. He spent all morning feet up on the sofa, under the blanket, just in the way of me trying to have a day with my boy. His breakfast stuff all on the side, towel just left on the sofa. I just asked him if I could have my sofa back, so I can feed and settle my lo, he said no, I will not go because you told me to (I just asked if whilst I'm trying to put lo down, could he read in his room).
We get into a bit of a discussing (argument), I said I have felt disrespected since he arrived and this is my home so certain rules and a level of respect if expected of everything. He argued that this was actually his home 
anyway, that's how it went, he is now in his room as I refuse to be stuck in mine with an 8mo because he thinks he can commender my home.
He's fudging nuts. I know my partner needs to step up, and say something, but I need him (FIL) to know I will not be walked over in my own home.
Sorry if that doesn't make sense, I'm on my phone and typing in a fury! These probably don't seem like a lot, but he just creeps me out and I've tried to like him, and I don't. It probably didn't help I had a guard up after the warning from my partners family.