A quick bit of research would seem to show that it's highly likely that Rose and Robert emigated.
You may already know the following, but just in case ...
According to a Public Member Tree in Ancestry, Rose had two daughters (both born in Broughton) before marrying Robert:
1) Frances HIGHT (born 1856 in Broughton, and died there in 1864)
2) Ellen Louisa Hight THOMPSON (born 1858 in Broughton and died 1934 in New Zealand)
Records of Assisted Emigration to Canterbury, NZ for 1872 include Samuel HIGHT (aged 59) and Helen (Ellen?) HIGHT (aged 13), both born in Northamptonshire. Helen/Ellen married in NZ in 1881.
Additionally, it would seem that Rose's elder brother, David (born 1829 in Broughton), also emigrated as his death is recorded in 1874 in Canterbury, NZ (Source: RootsConnect Family Tree).
Pennie