I am also a grand daughter of Carmela and Guiseppe. My mum is their daughter (maria she is the fifth child and she married and had seven children and now ten grand children) Our own family tree tree is huge already. I would love a photo of the wedding if you have one. I have some information regarding Carmela's step brothers and sisters.
Carmela's father Cono Miragliotta first married Maria Luisa Giglia and had the following children: Carlo Carmela Constantina Lucia Maria Luisa
Maria Luisa passed away and Cono married Teresa (surname unknown) they then had Ninetta (she married Con Raffael)
Unfortunately I am not sure who's daughter you are, terible isn't it!
If you need any info on Carmela and Guiseppe's family tree I am more than happy to help.