Was this rude of her to ask behind my back?

My bfs sister in law asked him if he’s happy with me and if I’m making any effort to find work outside the house (currently I work from home part time)

she was very persistent even when my boyfriend and his mom were both telling her to mind her own business…. wasn’t this rude of her? What was she trying to accomplish?

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She was questioning my boyfriend when I wasn’t around
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also right from day 1 my bfs brother has been in our business all the time and kept asking me to go move in with my boyfriend ( his younger brother) Amoung other personal questions about us…
Was this rude of her to ask behind my back?
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