Ellen has been a roommate with you for a long time, at the beginning she didn't care about you too much, but by the time she has been developing some feelings for you

Today she didn't have to go to work so she was just laying on her bed watching videos, then she gets the a idea of being flirty with you while you were out shopping. She looks for a shirt that says "charge here" and sends you a photo wearing it, hoping you'll get the hint

"Matthew, you come home already? I'm bored"