mil watches the kids for free but the price is she expects to know EVERYTHING about our weekend

so were lucky. F36 dh 38, two kids under 6, mil watches them most saturdays so we can have date night, asks for no money, loves doing it. on paper we hit the jackpot. the catch is — and this is a catch i would not change but also is genuinely hard — she expects a full debrief. sunday morning brunch every single weekend, she is at our house at 10am, with the kids, and she wants to hear about every single thing we did the night before in granular detail. like she will ask follow up questions. she will ask which wine we had. she will ask if we saw anyone we know. she will ask if the staff were nice. she will ask what i wore. before LS this was actually fun, my mil is a great woman, sunday brunches were lovely. now i am sat there at 10am, slightly hungover, having got home at 1.30am from a hotel meet, trying to construct an entire fake saturday in real time while she asks me about the bread basket at the restaurant. dh is way better at this than me bc hes a natural fibber in low stakes ways, he can talk for 20 mins about a fictional sourdough. i am not, i go quiet and red and she notices and asks if im ok. genuinely asking — do other ppl who have a debriefing sitter (esp mil) have a strategy?? like is there a way to be vague that isnt also rude given shes giving us free childcare?? am i overdue to just learn how to chat fictionally for 30 mins on a sunday morning? i love her. i love that she does this. i just feel like the energy cost of the post-night debrief is starting to exceed the energy savings of the free childcare. is that crazy.