Same Womb ~ Same Tomb

This is the grave of a

Brother and Sister

Francis Leyburn Yarker

and

Mabel Estelle Symmes

RIP

Same Womb  ~  Same Tomb

When I first saw this Epitaph, I couldn't help thinking that it was a little bit unsettling.

Arnold Francis Yarker ~ born in 1847, died 1896 ~ and Cecillia Mary Tully ~ born 1855 ~ were married in 1868. 

They had two children, a daughter Mabel Estelle ~ born in 1873 and a son Francis Leyburn ~ born in 1876 ~ who became a Private Law Tutor and who died in 1911 aged 35 years old.

It seems to appear by the change of surname that Mabel must have married, but I could not find any further information about her.

If they had not previously chosen to be buried together with this strange Epitaph, 

I wonder who did choose it and why ?.