^ AR no I haven't spoken to my teacher about it cause I feel like it's rude. I'm not really sure how to bring it up.
Did your teacher tell you that she would be taking a leave?
If she did, perhaps you could ask her what she had intended for you to keep up your piano lessons while she wasn't teaching.
Did she expect for you to have a pause in lessons?
Do you want to forgo piano lessons for the time she is away from teaching?
I do not believe it is rude to ask these questions of her if you simply ask her what she expects you to be doing during her leave. This would open up the conversation as to what type up options you might have. If you want to continue lessons TEMPORARILY with another teacher, then having her recommend a replacement for the short term would allow her to have input and also introduce you to your temporary teacher. This way any teacher she recommends knows that the lessons you are taking from them is for the short term.
Maybe others have suggestions on an approach with which you are more comfortable.
I have learned that being direct with a question I have gets the conversation going.
You could start out that you know that her maternity leave will be coming up soon and does she have any suggestions for you regarding keeping up with piano, piano lessons, whatever. You might say that you really feel you are making such good progress that you would prefer to have no gaps in instruction while she is enjoying her time with her new baby.
The topic of maternity leave is just a part of a any professional woman's life. Women physicians refer their patients to other physicians they trust when they are on maternity leave. So why not a piano teacher?