Create an accurate summary of the "goodbye" scene between marylin and her brother in "the cold equations"

In Tom Godwin's short story "The Cold Equations," Marilyn's goodbye conversation with her brother, Gerry Cross, is at first very tense but softens, giving Marilyn the courage she needs to be ready to depart.

Gerry Cross's reaction to Marilyn's voice is at first tense because he realizes she is on-board the EDS and knows what consequences ensue from stowing away on-board an EDS. When he realizes she is a stowaway, his first reaction is to feel angered, "hopeless and desperate," as we see when he exclaims, "Marilyn! ... What have you done?"

Upon hearing his reaction, Marilyn breaks down due her feelings of guilt for having hurt the ones she loves through her actions. She begs him not to feel hurt and begins to cry.