She lets the growth continue.

She decides to let her breasts continue to grow and she begins to explore. As the warm sensation continued to occur she started to notice the weight of her boobs. By the time her breasts reached m cup she couldn't take the strain anymore. "AI, is there a way to reduce the weightof my breasts?" There came no response but a pathway lit up, Samus followed the pathway until she came to a door marked 'ZERO-G ROOM'. "Not what I was expecting but I guess it works." The moment she stepped through the door her feet left the floor and she began to float in a spherical room. Although her breasts continued to expand; she didn't feel the strainon her back anymore and as she floated there she slowly fell asleep.