Please check in w/your lawyer as soon as you can. Something certainly does not sound right.
As for him being nice and chatty, do not let your guard down. Generally when they are like this they either want something or they have done something that will come back around and bite you on the rump. Like a teenager, when they've done something that the know mom or dad will be angry about, they generally become very nice, chatty and yes, even doing chores...hoping against hope that the parents will not blow a gasket over what they've done. This very typical behavior of someone in MLC. So, keep your eyes and ears open at all times.
Keep the focus on you and little one...and definitely watch your finances, as well as checking in w/your lawyer Monday morning.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
