I have had two dck who have come and needed morning naps because of teething and not getting enough sleep the night before or one getting up too early and I can't stand it ! It gets in the way of everything !! I would just do what your routine is . I have tried to keep my two up but it was unbearable so I put them to nap early and I'm sitting here while a 20 month old is playing because when u tried to put her down for a second nap she disrupted everyone else !!! If possible I say do what is best for everyone !!!