The Sun is the source of all energies. These energies stimulate the activities of the houses occupied by the transiting Sun and reinforce or weaken the planetary effects, depending on the Sun's aspect to the natal planet. When the Sun transits an inner planet, it may trigger a dormant aspect between that inner planet and a slower moving outer planet. If a planet is being transited by another planet when it is being transited by the Sun, the effect of the transit is strengthened.
Sun Conjunct Saturn
A Sun conjunction Saturn aspect gives your partner soundness of judgment and emphasizes their ability to focus on what matters to you both and builds a strong sense of purpose. This is a powerful indicator for a strong sense of personal security and a stable marriage despite the day to day distractions of domestic life. When the Sun person is conjunct the Saturn person, it strengthens your resolve and can boost your ability to define boundaries and direct your energies toward long term goals.