Board Thread:General Discussion/@comment-16446956-20130825050314/@comment-6881629-20130825105840

Hemming Black-Briar is the son of Maven Black-Briar and father of Ingun and Sibb, Maven is the Grand Mother of Ingun and Sibb both here and UESP agree on this.

Some dialogue in the game is wrong though and call Maven the Mother sometimes.