Well cleave is a type of standard action and grab is a different one, they can't be combined as I understand, unless you do something like<br/>"<em>Sticky tentacles</em>: On a successful slam attack the monster can make a grapple check to try and initiate grapple as a free action." - that basically adds a conditional extra effect that goes off once the normal hit is a hit. Basically with this trait you'd have a potent threat of grappling multiple characters at the same time (in which case the additional maneuvers will come in handy next round, as you'll have to split them among the girls, spending one to maintain grapple on each!)