Here are some indicators in that natal chart that may indicate infidelity. Taken alone, however, these aspects do not guarantee infidelity.

Moon square Venus:

This is especially true for straight men with this aspect. JFK has this aspect, and he was known for his affairs. The Moon and Venus are feminine planets, and often play a role in the kind of partner we desire.

The Moon represents our emotions and what makes us feel secure, while Venus represents how we give and receive love. When these planets are in square aspect to one another, our emotional needs are at odds with our needs and capacity to love.

This can cause many problems, as it is difficult for the Moon square Venus native to have both needs fulfilled by just one person.

For example, say I have Moon in Aries square Venus in Capricorn: on one hand, I am emotionally fulfilled by aggressive, direct, and passionate people. However, aggression and passion to not “agree” with my Venus in Capricorn nature; it is unattractive to me, as Venus in Capricorn prefers shy, stable, drama-free mates.

Also, we can think of this in terms of synastry: if my partner’s Mars is in Capricorn, and therefore is in conjunct aspect to my Venus, I feel a tremendous sexual attraction to my partner. However, it would also mean that my partner’s Mars squares my Moon, which leads to heated arguments and hurt feelings.

As a result, the native finds it difficult to find a partner who fulfills both their Moon and Venus needs, and might choose to have two partners: one who makes him emotionally secure, and one that makes him feel loved and attracted.

This can also indicate a Madonna-Whore complex; the native may have the inability to see his or her partner as both a nurturing type (moon) and a sexual being (Venus). To solve this dilemma, the native may choose to take on two partners in order to have these needs fulfilled.

Uranus in hard aspect (conjunction, square, opposition) to Venus/Uranus in the 7th house:

Uranus is the planet of freedom, rebellion, unpredictability. When in hard aspect to Venus or in the 7th house, the native craves freedom, variety, and excitement in relationships.

It is difficult for these natives to “settle down” into a “normal” relationship because of many reasons. For instance, relationships might make them feel restricted, bored, or they may constantly crave “newness” in relationships.

Its the initial feeling of getting into a relationship which excites them, so as time goes by, their interest may gradually decrease for their partner and their relationship. Bored of the everyday, “hum-drum” aspects of “regular” relationships, the Venus-Uranus/Uranus in the 7th house native may seek excitement outside the relationship.

Neptune in hard aspect to Venus/Venus in Pisces/Neptune in the 7th:

With this placement, idealization of partners in common. The native has an idealistic view of relationships and love in general, and is on a constant search for their soulmate.

They daydream about their ideal mate, and the kind of relationships they envision are other-worldly. Real relationships, however, are difficult; they require a tremendous amount of work, compromise, and often include conflict.

This is the precise reason why people with these placements have such a hard time with relationships. Real relationships rarely live up to the ideal relationships they often dream about, and when confronted with these realities, the native may choose to quietly exit the relationship, leaving their partner wondering where it all went wrong.

People with these placements are attracted to the unattainable. When someone isn’t yours, it is easy to keep the fantasy of them alive because you’ll never be confronted with the realities of a real relationship with them.

This ties in to the fact that Venus in Pisces often find themselves in the role of the “other woman” or “other man”; they get all the romance and fantasy of a relationship without having to deal with the hard work that comes with it.

Similarly, Venus in Pisces natives are sometimes described as “cheaters” for the same reason; if in a relationships, the “realities” of the relationship may push them away from their mate into the arms of another.

Venus in Pisces will not be forthright about their infidelity, however; they are too concerned about hurting you to ever admit they were unfaithful. If confronted, Venus in Pisces may deny the infidelity with an innocent, “who, me?” approach. It’s rare for a Venus in Pisces to leave their mate; they’d rather you leave them than the other way around.

Venus in Gemini:

Gemini is a sign which craves variety and gets bored at the drop of a hat. In Venus, Gemini craves variety in relationships. This sign needs to move around, experiment, and communicate with others in order to keep itself happy.

The sign Gemini is represented by the twins, which reflects Gemini’s dual nature. Indeed, you will often find Gemini-influenced natives having “two” of everything.

For a Gemini Venus, this would mean having two relationships. Gemini is a mutable sign; they can adapt to different situations seamlessly, so they have the ability to flutter between two relationships with relative ease. 

Venus in Gemini are big flirts; Gemini is ruled by Mercury, so they certainly have the gift of the gab and are talented at winning people over with their words.

Moon in Aries:

This placement is often regarded as a “cheater aspect” because of Aries’ passionate, impulsive, “act before you think” nature. Indeed, Moon in Aries natives often disregard potential consequences for their actions in favor of instant gratification.

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