Weird feeling

So I am 6 months pregnant and tonight after I got off work me and my husband were supposed to go grocery shopping but before we went he was going to drop his daughter off at her moms house which is right next to the store we were going to, and I said well why don’t we all go so you don’t have to drop her off and come back to get me and go all the way back that way he doesn’t say anything then right when I was about to put my jacket on I ask your car or mine and he just goes I’m just going to take her and I’ll come back for you ....I honestly think if the store that we were going to is right next to her house it would have been easier just to all go and he has been doing this a lot lately when he has to drop her off ....he’s been doing his hair nicer and putting his good cologne on and making sure to brush his teeth before he goes and dresses differently every time he drops her off with her mother....at first I didn’t think anything but he hasn’t been sleeping in bed with me lately he’s been sleeping either in one of kids room or garage....am I just crazy or do you think he still has feelings for her.... update sorry I left out some stuff but relationship wise he left her because she was in and out of jail and on drugs....he said he was young and dumb so their relationship ended bad.....me and her are not on good terms because she’s never really been around for her daughter it’s suppose to be 50/50 custody but she only sees her once every other weekend....I have been with him to drop his daughter off before and me and him already have a son together so she has seen me pregnant before we have been together for 6 years his daughter is 7...