Last night I had a lucid dream, which broke my dry spell of almost a month.
But, then something amazing happened. I had another one when I went back to sleep 5 hours later!

It was unprecedented, and I also hate how they both ended the same exact way. I will now start doing RC's when I wake up because of this:

1) First lucid lasted 10 seconds, my sister opened the door in my room while I was bragging that she wasn't real and that she was in my dream, then my mom came in and I woke up. But, I was asleep, I should've realized this from the mere fact that I "woke up" on the spot where I was standing. Which would mean I was sleepwalking... was quite frustrated when I woke up.

2) This lucid lasted a little longer, and I realized something was wrong when the DC's all surrounded my car when I was backing out of a driveway, so I pushed a button on the car and made it fly. Great feeling by the way, flying in a car. Then I heard my sister say "mom! he's not awake yet!" so I woke up and looked at the clock: It was 5:30. And the whole family was asleep.

This is the 3rd time now I have lost lucidity due to my sister being in my dream. I'm fine in the dream until I encounter anything resembling my sister, or sounds like her.

Any idea how I can stop this? My first lucid lasted over 10 minutes, it's very frustrating having the next 6 last no longer than 20 seconds.

TL;DR Sister in dreams is giving me false awakenings, don't know how to stop. Need help increasing dream duration as well.