Sun inconjunct Neptune love Synastry ~ Personal Integrity
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 Neptune
A Sun inconjunct Neptune aspect indicates that honesty, and personal integrity will become important issues between you and your partner. You have a tendency to believe what you want to believe. When the Sun person is inconjunct the Neptune person, be careful about what you say and don't say. Be very clear in your communications. Omitting pertinent information can create mistrust and uncertainty in your relationship.