Coleman's other daughter Sarah also committed suicide. She loved William Augustus Muhlenberg who was co-rector of St. James Episcopal Church in Lancaster. Robert Coleman again disapproved of his daughter's relationship. Coleman and Muhlenberg had a bitter dispute about evening worship services. Upon Coleman's death in 1825, Sarah had hoped to be able to finally marry the rector. Coleman's will granted his sons Edward and James the right to approve of Sarah's spouse. Edward also dislike Muhlenberg and would not approve the marriage. Sarah then fled to Philadelphia and committed suicide.