Sun conj NN in 7th just means that your greatest path for growth as two people was in a relationship with each other, and that your core personalities are the key in making it happen. For some other people it might be something else - sex, control, money, whatever. For you it was your core disposition and obviously the communication. Sun conj Saturn (although wide) also adds longevity. Be aware Neptune is transiting this house and these planets, so if things ever get strange, confusing, vague - if you ever both suddenly start questioning your relationship, this is Neptune's influence here so be aware. Uranus will also be transiting over composite Venus and opposite Pluto next year so be aware of any control issues or jealousy that might suddenly pop up out of the blue.