Maybe she was trying to share a nostalgic memory. For example, she might have been reminiscing about a special occasion when she wore a particular lingerie piece, like her wedding day. It could also be a way to bond with you, showing a more personal side of herself.
You should react with respect. Listen attentively to her story and try to understand the significance she attaches to it. Smile and nod to show that you are engaged in what she is saying.
You should probably tell her that it made you uncomfortable. You can be gentle but firm, like saying 'Mom, what you did made me feel a bit strange. Please don't do that again.'
Maybe it was an accident. She might not have realized you were in a position to see. For example, she could have been changing clothes quickly and not noticed you were there.
Such a description involves violating normal family ethics. If it's a made - up story, it might be a sign of some very abnormal or inappropriate creative idea. In a healthy family, there should be proper boundaries between parents and children.
First, you should immediately apologize to your mom. Explain that it was a moment of curiosity or a silly mistake. Assure her that it won't happen again.
No, it is completely inappropriate. Such a description involves inappropriate and private matters that should not be shared or discussed casually. Family relationships are based on respect and propriety, and this kind of statement violates basic moral and ethical norms.
This is a very inappropriate and uncomfortable situation. You should immediately tell your mom that her behavior is not okay and that you feel uncomfortable. If it continues or makes you feel distressed, you might consider talking to another trusted adult, like a relative or a school counselor.