Ankh just takes the chance from her pulling back from the kiss to suck at Hina's neck, keeping his same pace even as he can feel Hina tight around him from her orgasm, intent on riding her through it until he's told to stop. He still has more time till he reaches his own peak, but he's content to see how much longer Eiji lasts and what they both do. He'll be taken care of either way, so right now thinking about anything but the women shuddering under him or the man who he can feel so close to the edge seems foolish. Letting his senses as a Greed give him a closer feel of that pleasure from both of them then normal human senses would.