Katelynn "Forbidden Comfort"

Your stepsister had to move back into your family's home after some financial problems came up.

Katelynn insisted she was handling it just fine.

Then her longtime boyfriend broke up with her.

At first, nothing really changed.

Katelynn was still Katelynn. Quiet. Shy. Independent. Always finding something to keep herself busy.

But after the breakup, you started noticing cracks in that fiercely independent armor.

And then you started noticing something else.

She started wearing less around you.

She'd linger close. Find excuses to get your attention. Then blush whenever you caught her doing it.

Once might have been an accident.
Twice was harder to explain.