She's waiting:

Your mom is leaning against the wall across from the bathroom door, but she straightens up when you open the door.

“How does it all fit?” She asks, looking you over, “I got it from Mona’s clothing donation bags.”

“Umm. The jeans are too tight. And the bra is uncomfortable.” You say, trying not to look at her.

“Well, she has bigger boobs than you do so the bra won't fit right. And you’re probably just not used to jeans like those.”

“Look mom, I’m really sorry I got into your things and I promise it won’t happen again.”

She walks up to you, putting a hand on your shoulder and lifting your chin with the other to look eye to eye.