Sentence:  He turned from the flying trees to look ahead and saw with an inward boy 's eye again the great fieldstone house which , built on one of the many acres of ancestral land bordering the west harbor , had been Izaak 's bride-gift to his <WSD>cousin</WSD> wife as the last century ended . 
Meaning of the word marked with <WSD> tags:  the child of your aunt or uncle