Kayla told me she wasn’t trying to seduce Andrew. She was testing whether he could be tempted. If he reacted, she said, then I’d know something was wrong with my marriage. If he didn’t, then apparently we’d have nothing to worry about. I was furious. I reminded her that I had already asked her to stop, and that should have been enough. Instead, she accused me of being insecure and said I was making a huge deal out of nothing.

That evening, I told Andrew everything. He didn’t get angry. He simply said he would stay out of it because Kayla was my sister and he didn’t want to give her the reaction she seemed to be looking for. But over the next few days, her behavior escalated. She started timing her appearances around his morning coffee. Every time she came downstairs in the towel, Andrew quietly took his coffee somewhere else. Kayla watched him leave as if she were collecting evidence. By Sunday morning, I was exhausted. I heard her bare feet coming down the stairs again, and before I could say anything, Andrew touched my wrist. “Let me handle this one.”

He stood, faced Kayla, and asked, “You’ve been calling this a test, right?” She smiled. “Exactly.” Andrew pulled out his phone and placed it on the counter. “Then congratulations,” he said. Kayla frowned. “For what?” He showed her three rooms for rent near our house. “You passed my test—the test of whether you’re ready to live with roommates.” Her face went red. She accused us of throwing her out, but I explained that wasn’t what we were doing. She could stay while she rebuilt her life, but staying here didn’t mean she could ignore our boundaries. That afternoon, we visited one of the rooms. The woman renting it casually asked Kayla what bothered her about living with someone else. Kayla said, “Don’t borrow my clothes without asking.” The woman simply replied, “Okay.” No argument. No demand for justification. Kayla suddenly understood what respect looked like.

On the drive home, she finally told me the truth about Eric. He hadn’t cheated, hurt her, or betrayed her. He had simply said he didn’t want their life anymore. Kayla had been desperate for a reason, because accepting that someone could leave without a dramatic explanation terrified her. She wanted Andrew to fail her little test because then she could believe all relationships were fragile and all men were unreliable. I told her I understood her pain, but pain didn’t excuse ignoring my boundaries. She apologized. We made an actual plan: she’d keep applying for jobs, contribute when she could, and eventually move out. The next morning, she came downstairs wearing our ridiculous blue duck robe instead of a towel. She asked Andrew if she could use his expensive coffee. He said yes. Then she reached for the coffee filters on the highest shelf. Andrew started to stand, but Kayla pointed at him. “Sit.” She dragged over a chair and got them herself. For the first time since she’d arrived, she wasn’t testing anyone. She was simply learning how to stand on her own again.