Isabel squatted on the toilet, noticing the bloody stain on her underwear, and remembered she was in Raymond's restroom. She used some sanitary paper as a makeshift pad and went back to Percy's bedroom to look for sanitary napkins.
Isabel had been staying with Percy for a while, but she spent a good amount of time in the hospital. Percy, being a man, naturally wouldn't have female hygiene products on hand. Coincidentally, there were no sanitary napkins at their place!
Isabel knew she was bleeding heavily and wouldn't be able to hold out until she bought sanitary napkins. As she continued to rely on the paper pad, she reluctantly left the restroom and called out for Percy.
Perhaps she was too loud, and as she called for Percy, she also summoned Raymond.
Given Raymond's presence, Isabel reconsidered blurting out "I'm on my period, can you help me buy sanitary pads?" Instead, she thought for a moment and told Percy, "I need bread. Can you help me buy some?"