How does seeing the drowned woman on the beach affect the narrator and his girlfriend in the story, We Didn’t?

The young woman was pregnant, and the young narrator is disturbed by the way her body looks. Readers do not receive any more information about the drowned woman, and this mystery continues to haunt the young girl, so much so that she can no longer be intimate with the young narrator. The young narrator sees the drowned woman as the force preventing him from losing his virginity. But as he reflects on the experience as an adult, he knows that the more important effect the drowned woman had was on his girlfriend, who was traumatized by the experience and who could not shake the image of the woman from her mind.