I don't like to tell my mother if I am going to go meet a woman?

It's uncomfortable because she says weird things or gossips.

Like my brother was staying with a MALE friend, and with like family there she asks him if he slept over a girls place... such a weird thing to say!

And I don't want her repeating my business, so usually if I have to explain where I am say I am meeting a friend from school or work, etc.
I don't like to tell my mother if I am going to go meet a woman?
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