Hey there, 987 from F95zone here. Glad you liked my mod :) Found a bug though, in the getessencesfromsex function in sexuals.gd Harpy is misspelled.
elif slave.race in ['Hapry', 'Centaur'] || slave.race.find('Beastkin') >= 0 || slave.race.find('Halfkin') >= 0:
should be
elif slave.race in ['Harpy', 'Centaur'] || slave.race.find('Beastkin') >= 0 || slave.race.find('Halfkin') >= 0:
Keep up the good work!