if karryn is on the ground getting gropped forever it's faster to just spam revitalize until you lose all energy and lose the fight. Not ideal but it's faster. Otherwise you can ALT+F4 and restart the fight hoping for easier/less enemies or avoid the fight altogether.The sex scene 'fights' go on for fucking ever.
Would be a really great game without these incredibly tedious encounters where you aren't making an interesting or valuable decisions, just endless clicking through the same stuff. (This is with the options to speed stuff up turned on)