Xyveris chuckled, low in his throat.  "Well that's simple," it said.  "We want you.  You see we don't have many females that come into the grounds that have a touch of magic.  Too much and we can't use them.  Too little and they don't see.  But you see.  You have enough.  And I think you'll be just right."  The thing moved closer to her, looking down at her, the smile on his face so broad it seemed to split his face in two.<br/><br/>"You'll assist us in populating the males of the species," it said simply.  "And he'll be given freedom.  Of a sort.  That won't be required of him as often as it will be for you.  But he won't be free until we're sure you won't harm any of the children that'll come of your union with us."  The threat was implied.  If she didn't do anything, she'd quite possibly be killed along with her brother.