@Aria20 I know you posted yesterday so will already be at your in laws for lunch, so I'm a bit late. But the way I see it is you have a dog now and people either need to accept that they come with you, or that you need to rush away to get back. I wouldn't worry about it being rude, you're just dealing with your responsibilities. We only tend to leave ours at dinner time or later, we crate her and she just naps. I haven't tried leaving her for any length of time earlier in the day but I don't think she'd like it very much. Hope you got on okay today and came up with a solution. Would FIL have let her in the house if she was crated? That might be a compromise, she could see you and be near you but won't pester him.
@tizwozliz I definitely advise sleeping in the same room for a while, it helps them settle in. We did it for a few weeks and then moved upstairs and now Ashpup sleeps independently downstairs.
@fajitasrock Sorry to hear you're having a tough time, it's very very normal though and it will get better. I have a partner but he took not well shortly after pup arrived (partially caused by not eating and drinking enough cos pup took priority) so all the care fell to me for a couple of weeks and it was hard. Have you got anyone nearby who can come and sit with pup while you have a shower or a nap? My sister in law was really helpful and she saved my sanity. He will sleep better as time goes on. Crate training will likely help as you'll be able to pop him in there and know he's safe but it's not a quick process. It does get better though, just the first month or so is very hard work.