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 Inconjunct Venus
A Sun inconjunct Venus aspect indicates that your partner has very different ideas about how to create a romantic and domestic relationship. That is what intrigues you and attracts you to them. When the Sun person is inconjunct the Venus person, there is something about the way you look, the way you act, the way you love that they find very attractive because it is fresh and novel and so different from their ideas. You inspire each other but you will find yourselves having to adjust and adjust if you aren't going to let the little things drive you to frustration