Help please? :)

So the little girl I’ve been babysitting she is almost 2 and she has finally stopped crying and has gotten use to being here but... her naps are not going so good! Her dad said she naps 1 30hr to 2hrs! But here it’s only 35 mins! He says she likes being cuddled to sleep but there is a problem I put my 7 month old down for a nap at the same time she goes down for a nap and he likes to be cuddled to sleep for his naps... I don’t want to make it sound mean but my son is just a little more important no?? I dont know what to do? She fell asleep yesterday without being cuddled but she woke up after 35 minutes!!