She's talked about love bombing before, but she seems to be missing the point. I think it works when you have a hectic life and it's good to just switch off and spend time with your child, almost giving the day over to them (within reason). She doesn't have a full time job, and yes she's studying, but I'm sure that's part time too. She has the luxury to do this kind of stuff with her kids regularly.
Her kids don't need a big day out from her, they need her to help them through this transition. Of course they're unsettled at bedtime, they need their mum. TB isn't a stranger to them (parking that argument for now), but he's not the one who should be putting them to bed and reassuring them. I hope she wasn't watching Below Deck whilst someone else took over the traumatic bedtime.