Those morning, DH was on a video-call to his mother, with our toddler on his lap. I went in and sat down, feeding the baby. MIL (who is for some reason opposed to breastfeeding- I suspect it's because she didn't do it) asked after the baby, DH said something like "oh, DW is just feeding her". At that moment, the baby came off and I said something like "she's off now, you can have her?" and DH shook his head at me. No idea what's going on there. I'm not allowed to speak to MIL because I had an argument with her after DH scapegoated me (long story, dysfunctional in-laws) a while ago, but later messaged her, apologised, explained (along the lines of) it's mad to be causing a rift in the family and we need to get on for the sake of my DH and DCs. She seemed to accept the notion that we at least need to appear to get on. I assume she hasn't mentioned this to DH. I can't remember if I did, possibly, possibly not.
N.B. I wasn't going to be on the call at any point, I was simply offering to hand the baby to my husband. Maybe he didn't want to admit I was in the room? Any other logical explanations?