When Pedro and Tita consummate their love what magic occurs? How does it affect Rosaura, Esperanza, and Chencha?

Tita sends Dr. Brown away with a kiss and returns to the kitchen to put away the dishes. The “darkroom” where Mama Elena used to take her baths is now used as a place to store kitchen utensils. When Tita enters it to put away the utensils, Pedro stealthily enters behind her and closes the door. He pulls her to Gertrudis’ old bed and takes Tita’s virginity. Chencha and Rosaura observe light shooting out of the room but both believe it to be the sign of Mama Elena’s ghost and neither goes to see what is happening within.