1) Uh, no. I barely remember what I did yesterday, lol.
2) I'd have to ask my mom, but I HIGHLY doubt it.
3) My son is 27 months and he actually DOES ask to go "ni-ni" at about 8:00pm. We have had the same general routine since he was an infant that was bath, lotion and jammies, bottle, bed. He doesn't get the bottle now, but gets his teeth brushed and a book.
That being said, I have a 6 week old that is a totally different baby than the 2 y/o was. He may have bedtime struggles. Who knows?
You aren't doing anything wrong and it's strange that your SIL would comment on it. Even when my friends ASK me for advice, I would never say something like that. But, oh well. I think there is a book out called "I Was a Great Parent Until I Had Kids" or something like that, lol.
The way I see it, if it works for you and you are happy with it - that's the "right" thing to do. So, don't fix it if it isn't broken in your mind.