Mary Ann Trusler/Hurst/Chantry???

[Phoenix]

Mary Ann Trusler b 1823, Salisbury, Wilts marries William Hurst in Southampton and has two children:

William J BORN 1848
Mary Ann b 1850 both Southampton.

They all vanish off the radar until Mary Ann b 1850 re-emerges in 1869 to marry Thomas Cross, in Southampton.

A Mary Ann Hurst marries in 1854 to either George Allen or William Albert Chantry. Mr Chantry appears on several trees, but alas little seems to be known of him. I assume that "mine" is Southampton born.

Can anyone find out what happened to Mary Ann Hurst b 1850 in 1861? And her brother, who reappears in 1881 in Southampton, so I assume he is in Southampton all the time?