Just to be incredibly angsty, imagine your OTP going through the snap.
Imagine how they are in the middle of something normal and one turns to the other to share a smile or say something when they other just falls into dust.
Imagine that they felt it coming, crumbling slowly away as the other sobs and tries to desperately hold them together.
Imagine the one left behind waiting for years, trying to live without their partner at their side.
Imagine they joy when the other returns. The tearful reunion and the promise not to leave each other again.
Or, imagine the confusion when one returns to find that the other has moved on, aged and in a new relationship. Imagine them trying to cope with all these sudden changes without their partner, remembering a time when they were happy and wishing that they had stayed. Imagine them moving on with a family now years older than them, feeling misplaced in this whole new world.
Imagine your OTP.