How initially 'to get her in the sack' and subsequently to avoid 'her giving you the sack' are not identical dilemmas faced by the male species, but they sure have a bizarre habit of being bedfellows
No matter what happened, there was always one thing Isla could rely on: the sheer arrogance of male wolves. That, and their overriding assumption all females found them irresistible and were desperate to get them in the sack. Mostly she was desperate to get them in the sack, if only to stop their whining, but she didn't think a sack six feet under was precisely what they meant.