When anyone wishes to express indignation about an unwelcome encroachment, the accepted metaphor is not, Can you believe So-and-so was in my living room, uninvited, playing my piano?! The expression is, Can you believe this was going on in my own backyard?! Miss Manners mentions this as a reminder that if you want to maintain good relations with the neighbors, you will absolutely have to be considerate, which means: giving notice of your plans; reassuring them that you are available to handle any unintended inconveniences
If I respond that I don't have whatever she is looking for, she usually replies, That's OK, I found something else to use, as if it is my fault she doesn't have something in her house. It is very irritating, to say the least! This is a neighbor who, when she is out of the house, is more interested in her phone than in talking to my husband or me.