Sun Square Saturn love Synastry ~ Overcoming Limitations
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 Square Saturn
Sun square Saturn aspect finds the partners feeling restricted by limitations. Both will desire to achieve their goals but find themselves challenged by the demands of the other. With the Sun person square the Saturn person they may make you feel such a sense of heaviness, seriousness, or obligation that you are not comfortable in their company.