Perhaps the woman has taken on multiple jobs to pay off debts or to save up for something big. Maybe the job market is tough and she has to work hard to keep her positions. Another possibility is that she enjoys the challenge and sense of accomplishment that comes from such a busy work life.
It could be that there's a lot of pressure on her to succeed or that she's passionate about her work and wants to put in the extra hours. Also, the company she works for might have demanding schedules.
Maybe she had a really busy and tiring day before, so she couldn't stay awake at work.
Maybe she had trouble getting ready in the morning or there was traffic on the way.
It's because of the Earth's rotation. As the Earth spins on its axis, different parts face the Sun at different times, causing day and night.
Maybe she had a bad dream or heard a strange noise outside.
It could be that she saw someone else having a better Valentine's Day and felt jealous. Or maybe she had a bad day at work and it ruined the mood.
Maybe she ate something that caused her to burp. It could just be a random funny moment in the cartoon.
Maybe she has a strong goal or belief that keeps her going.
Maybe she's trying to be charming or flirtatious.
The cartoon woman might scream because she's facing a sudden and unexpected event. Maybe a monster appeared out of nowhere, or she lost something very important. Sometimes, it's just for comedic effect too.
Maybe she's in deep thought or saw something that caught her attention.