How does Radmila Lazic use imagery in Death Sentences?

In the second stanza, the second line describes the speaker's hair spreading over the "dark" water, and the next lines imagine her eyes floating beside the water lilies, disturbing them. Lilies are associated with purity and virginity, which implies the speaker's eyes are pure, but since they "upset" the water lilies, there is also the implication that there is something disturbing and unsettling about this kind of purity and virginity. It seems as though her lily-white eyes are somehow floating disconnected from her head, which suggests that the drowning is quite gruesome.