I don't know why my DiLs consider Halloween the perfect time for me to put an AMA in AIBU, but as you know, I am always happy to help. 
You may wonder how I got into AIBU while you were out, well I had my own set of keys cut, I knew you wouldn't mind. I must say the place was absolutely filthy and I have had to give it a good scrubbing (I tidied up your knicker drawer while I was at it), don't worry I don't expect any thanks! Now it is looking a little better and I have time to put my feet up with a cuppa and answer some of your questions. I have opened that naice box of chocolates I found in the bottom of your wardrobe, waste not, want not I always say.
I consider myself an expert on most subjects so do feel free to ask me anything you like. Here are a few FAQS to get you started:
Should I go to MiL for Christmas? Of course, I have already got the sprouts on and nearly finished knitting you a hideous jumper with one arm slightly too short. It should be most jolly.
We have already named dd 1 after MiL, should I name dd2 after my own mother? There's no need to choose a family name for your second, I would go with a flower name, something classic like Rose (coincidentally my own middle name).
Are you in favour of Brexit? Yes, I am sorry for my friends who have retired to Spain, but I'm afraid it's a necessary first step towards restoring the Empire in time for our dear Queen's centenary year. I am not so naive as to think it will all be smooth sailing though, and I am certainly not adverse to a bit of "prepping". I have built up quite a stockpile myself. Luckily your FiL is partial to spam.
What do you think of trick-or-treating and should I decorate the house for Halloween? Quite frankly no-one would notice the difference if you turned your house into a ghastly hovel festooned with cobwebs so I shouldn't waste your time. As for trick-or-treating I used to think it a vulgar American practice not that much different to demanding money with menaces, but then I found out that, in fact it is all based on the ancient Scottish tradition of Guising so that is absolutely fine.
Now I look forward to answering any other questions you may have for me so ask away.