Kelly/ Dwyer of Seskin North: mystery

Hello from the USA!
My grandmother Marie Anne Kelly was born 1893 in Seskin North, parents William Kelly (b. 1861) and Mary Dalton (b. 1868). She had 2 older brothers William (b. 1888) and Thomas (b. 1890). William Kelly Sr. died 1896 aged 35. That same year, my grandmother was sent to Norristown Pennsylvania to live with her paternal aunt Mary Kelly Grady. The family legend has it that she had a club foot and was sent to America to have it straightened non-operatively. Marie was raised by the Gradys and never returned to Ireland.

It seems that her mother Mary Dalton Kelly married again, a young widow with 2 small boys. She and Michael Dwyer and had 4 more daughters: Anastatia (1899), Mary Brigid (1902), Jane (1905) and Cathleen (1907). Mary Dalton Kelly Dwyer died in 1910; the death is registered in Urlingford. We don't know where she is buried.

My great uncle William Kelly died in 1967. His brother Thomas emigrated to New Zealand after WW1. We don't know if either of them ever married.

The real mystery is: can anyone tell me whatever happened to the 4 girls who would have been my great aunts? 

Kind regards and thank you for any help.

Mary