Lillian, Bush Creek meeting was part of the Pipe Creek Monthly meeting with meetings alternating between the Bush Creek meeting house near Monrovia and the Pipe Creek meetinghouse in Union Bridge. So, to answer your question, though the intent to marry was announced at Bush Creek on the 19th of 12th month 1772, the actual wedding took place at Pipe Creek in 1773, and both events were reported by the monthly meeting, in this case, Pipe Creek. The only child listed in Pipe Creek's records for Samuel and Mary was Daniel, born 8/3/1774, but in 1781, Mary Cookson requested a certificate to the Menallen area forself and her family, so it is possible that additional children may have been born after the move.
Daniel married Sarah Edmundson in 1795 at Warrington meeting, according to my notes, but I don't have documentation for their children.
As a side note, Samuel was Mary's second husband, her first being Daniel Haines, by whom she had four children. Mary's maiden name was Price and her family was originally from Baltimore county.