I must agree with most of the other Posters it would be nicer if she would use
Nicole and
Nicola or
Nicole and
Nicolette as middle names or better still as someone else suggested
Nicole and
Victoria or another family name
Twins have to share so much and giving one a nickname of the others middle name isnt particularly fair to my mind but its her child :)
Tiffany Nicole not my style but flows nicely
Lydia Nicki -
Lydia is lovely but I dont like Nicki
idea's including a few other middle names
Tiffany Victoria and
Lydia Nicole Cecilia Nicole and
Lydia NicoletteAnna Colette and
Lola NicoleValentina Nicole and
Isabelle NicolaAudrey Nicole and
Isabel Victoria
Just a note to say my sister is called
Nicola and her daughter is
Victoria its a nice theme because very few people see the connection straight away