My ancestor was Alice Watkins - Mary Ann's sister. I was told that she emigrated but was unsure if it was NZ or Australia. I have no proof but anecdotally was told the following:

Mary Ann lived in Australis. Married name Everett (Everitt)? Her son married a Spanish girl who was Australia's champtionship bike rider.

Eliza Watkins lived in New Zealand and married ship's Capt Moore who sailed the UK-Aus-NZ routes.

I have never investigated into these parts of my family tree yet but please let me know if you can discover anything. i have a photo of Alice with a Spanish-looking girl (Romany looks)and this might be Mary Ann's daughter in law.