He is not thinking of his responsibility to her, but of his rights over her, and of her obligations towards him." This interpretation makes it sound as if the man is expecting the woman to bear him children. In a time where women were considered men's property anyway, not only would the woman be possessed by her husband, but her children as well.
Not only is the rose tree trapped underneath the possessiveness of the man, but another "trap" could be implied according to Antal with "The rose-tree, as a rose bush, hints at the possibility of childbearing." Durant furthers the point of possessiveness when he says, "The keyword is 'I've'. What he affirms is not that he is hers, but that she is his.