^As of right now I would definitely say Ass Worship 14. Sheena's DAP in that scene is absolutely incredible! She's really into it, you can tell! And she does it in several different positions.
Her Ass Wide Open DAP is only with a dildo
That being said, I haven't seen her Ass Factor 3 scene yet...it might just top them both! If we're lucky
She has done three already! Very quickly. I think she really genuinely enjoys it!