How to know your partner is cheating astrology?

House of Relationships In astrology, the 7th house in a person's birth chart often relates to partnerships and marriage. Unfavorable aspects or placements in this house might suggest challenges or infidelity issues within relationships.

Planetary Transits The movement of planets like Venus (love and relationships), Mars (passion and drive), and Neptune (deception and illusion) can influence relationships. 

Synastry and Composite Charts Comparing birth charts through synastry (individual chart comparisons) and composite charts (a combined chart representing the relationship) can provide insights into compatibility and potential areas of tension or deception.

Moon Signs The Moon sign represents emotions and instincts. Sudden changes or inconsistencies in emotions might be reflected in the Moon sign, potentially indicating hidden feelings or activities.