I don't know if in the best person to answer this as R's NNDs are few and far between. We tend to stick to a 12h day on a NND, so BT at 6.15pm (asleep by). So maybe allow her the odd nap, capped even at 1hour if you think that won't mess the night up and your usual BT or not let her nap and do a few 6pm BT. Also at least that way if she plays up, she's in bed earlier o help get some of the shenanigans out of the way?
H x