BG: I posted about NN a few times, last being that her house burnt down and she left out her wind chime while she was living elsewhere. The only complaint I ever made to her about noise was about the wind chime through a note. endBG.
I never complained to her Land Lady (LL) about noise, but I have an inkling that Neighbor on the Other Side of her House (NOSH) did complain. NOSH and I are friendly enough to have a chit-chat when we see each other, but we are not friends.
Over the summer, NOSH stopped by my house while I was out front and told me that she had talked to LL, wondering when the renovations were going to be finished, etc. Then she rolled her eyes and said "Guess what. NN is moving back in. I was really hoping that LL found different renters . . ." Just then, the kids came home so I politely cut her off didn't get a chance to finish our conversation (plus I didn't really want to gossip about NN.)
When NN moved back in, about 2 weeks ago, it was late at night (I think the first truckload pulled in at 10:00 p.m.) on a weeknight. There was quite the ruckus, but understandable noise for a move-in. After a while (I wasn't watching the clock, just trying to get to sleep) I heard NN shout out
very loudly proclaiming:
"WOO HOO! NOISY NEIGHBOR IS BACK!"
Yes. She used those exact words. Noisy Neighbor. I cringed and thought "Does she read e-hell? Does she know what I've nick-named her? Does she know that I've been complaining about her behind her back?"

Several days after her second move-in-noisy-night, I left her a small gift bag of home-grown (not my home

but my mother's) tomatoes, apples and pears with a note that simply said "Welcome Home!" I signed my name and included my phone number.
Since the move in, all's been pretty darn quiet. I really can't complain about any noise. Yippee!

She hasn't thanked me for my welcome gift, which I honestly don't care about. Maybe she's waiting to see me in person?
More of a forecasting etiquette question, when I do get a chance to talk to her in person: What if she says something like "I know you complained about me to LL about my noise." How do I respond to this? I really don't want to throw NOSH under the bus and say "Hey. It wasn't me. NOSH was the one that complained."
I understand that this is a "What If" question, but I don't want to be thought of as the bad guy . . . the neighbor that complains. KWIM?
How would you handle this situation?