How these two meet
Ask how the two of you met and you will get an anecdote, and the anecdote is not about either of you deciding anything.
Neither of you has ever pursued anybody. In neither case is that modesty.
Sagittarius goes where the thing is already happening. Aquarius takes a position and waits for the world to arrive at it, and has been right often enough to consider that a method.
There is no cardinal modality in this house. Between a mutable sign and a fixed one, one adapts and one holds, and the one that opens is missing, so everything the two of you have was begun by a third party, a job, or a room you both happened to be standing in.
Jupiter and Saturn are the two slowest bodies visible to the naked eye and they come together once every 19.85 years. Between one of their meetings and the next, everything faster crosses the entire wheel several times over.
So the two of you wait well. You are both better at it than anybody you know, and neither of you has ever asked what you are waiting for.
For Sagittarius, the work is going towards one thing that is not already underway.
For Aquarius, the work is asking for something before the situation has made asking unnecessary.
The question
What would either of you have to stop being, for this to start?
One conscious action
one thing, asked for
Each of you ask the other for one thing directly this week. Not a hint, not arranging the conditions, not waiting for it to become obvious.
The sentence begins with I want. Neither of you has said those two words in this house.
Jupiter takes 11.85 years to cross the wheel and Saturn takes 29.43, and the two slowest things anybody can see are the two things in charge here.
Nothing between you has ever been rushed and nothing has ever been demanded, and everybody who knows you has quietly wondered when.
So who is it that either of you is still expecting to arrive and start this?