Thank you for sharing your dream with us. Please take everything that I share back to the Holy Spirit as He Alone gives the accurate interpretation.
Yourself and sister need to take your “assigned seats” for “take off!” Reflect on a venture that the two of you might be thinking of embarking or have started. The dream appears to show your roles. Your sister may be the main person (#1) and you might be her support, but it is now time for you (#70).
The Lord is doing something in both of you and you cannot afford to be nonchalant. I think of Matthew 11:2.