The hubs fetched his father from the hospital late last night. Since when do hospitals discharge patients in the evening? The hubs said his father probably insisted and 'made' the Dr discharge him. And so the youngest BIL sent his mother back home too. Although the hubs left after dinner, after 8ish, he didn't reach home till 11ish and apparently, he was waiting for his mother to return home before he left. 

So it's back to normal for all the households today and the group chat between the 3 'out-laws' has also quieten down. Lol....it's good riddance to all.