This time I feel that "we" were wrong. The "we" being the people in my house. Specifically DD#2 and her BFbob.
Last Tuesday night I was in bed reading, it was 9:something p.m. All the windows were open, and it seemed that NN was setting up her stereo. She was playing some tunes, VERY LOUDLY! then, the music went off and I heard her laughing saying "This stereo is kick-a***! Isn't it? The volume was turned way back up . . . at least she was playing decent tunes! "Stairway to Heaven" etc.

I didn't see a need to complain (even though I was trying to drift off) since it was still before 10:00 pm (quiet time in our town.)
Then I heard a knock on the door. I thought it was someone knocking at my door and figured that DD#2 would answer, since she and BFbob were in the living room watching TV.
Stereo went off and I heard a male voice asking NN to please turn down her stereo. I thought it was NOSH's* DH knocking on the door and making the complaint. All was quiet and I was able to drift off to sleep, so I didn't worry about it all.
Last night I found out that it was BFbob that knocked on NN's door. Apparently the music was too loud for them (DD#2 & BFbob) to hear the TV (they keep the volume on the TV down while I'm in bed.)
I was a bit put off by this because:
#1 it was still before 10:00 (9:50 when I heard the knocking)
#2 the music hadn't been playing for all that long (maybe 30-40 minutes?)
#3 I'm trying to make peace with NN so that our neighborly friendship doesn't have any strife.
#4 It wasn't BFbob's place to complain to the neighbor. Although he did it with DD#2's urging.

I almost think that an apology to NN is in order. She really has been extremely quiet in the middle of the night and hasn't been overly obnoxious with her noise since she moved in. I don't want her to be uncomfortable in her home.
What do you think I should do?
*NOSH --
Neighbor on the
other
side of NN's
house.