Joseph and Sarah had 5 children:
Ann Raney bp.14/7/1827 Holy Trinity, Coventry, dau. of Joseph and Sarah
Sarah Reaney bp.17/3/1829 Holy Trinity, Coventry, dau. of Joseph and Sarah
Joseph Reaney bp.11/8/1834 St. Michael, Coventry, ditto
Robert Reaney bp.27/3/1837 Holy Trinity, Coventry bur.26/6/1837 St. Michael ditto
Thomas Reaney bp.24/12/1838 St. Michael, Coventry ditto
In 1861 Joseph the younger, and now married sister Ann are living with an aunt:
1861 - Holy Trinity, Coventry - ref. RG9 - 2207 - 93 - 26
Jane Nelson wid. 48 Silk Trade b. Coventry
Richard Nelson son 24 Painter ditto
Joseph Reaney nephew 26 Painter ditto
Ann Oram niece 33 ditto
Since Joseph senior born in Ireland an aunt, born Coventry, likely to be a sister of their mother.
John Nelson married Jane Warring 10/3/1835 Holy Trinity, Coventry.
A Jane Waring bp.11/11/1816 St. John, Coventry to John and Mary
John and Mary had numerous children (which included a Richard who Jane may have named her son after), including a Sarah bp.4/4/1807. The surname varies on familysearch between Waring/Warring.
The only way to confirm if Sarah's maiden name is Waring (or indeed anything else) in the absence of a marriage is to get the birth certificate of the youngest child Thomas b.1838.
Annette