There are many factors that can affect the fidelity and loyalty of a person in a marriage, such as:

• Personality and temperament
• Likes and dislikes
• Values and beliefs
• Goals and aspirations
• Expectations and needs
• Social and environmental influences

However, sometimes the infidelity and extramarital affairs are not due to these personal factors, but due to the unfavorable planetary positions and combinations in the birth chart of the person. Some of the astrological factors that can indicate the possibility of infidelity and extramarital affairs are:

• The 7th house, which is the house of marriage and spouse, is afflicted by malefic planets such as Saturn, Rahu, Ketu, Mars, or Sun. These planets can create obstacles, delays, and difficulties in finding a suitable partner and getting married. They can also create dissatisfaction, boredom, and frustration in the marital relationship and tempt the person to seek pleasure and excitement outside the marriage.
• The 7th lord, which is the ruler of the 7th house, is weak, debilitated, retrograde, combust, or placed in a bad house such as the 6th, 8th, or 12th house. These conditions can hamper the prospects of marriage and cause delays and disappointments. They can also weaken the bond and commitment of the person to the spouse and make the person prone to infidelity and extramarital affairs.
• The Venus, which is the planet of love, romance, and marriage, is weak, debilitated, retrograde, combust, or afflicted by malefic planets. Venus is the significator of marriage and spouse and any weakness or affliction to it can reduce the chances of getting married or finding a loving partner. It can also reduce the attraction, affection, and intimacy between the couple and make the person seek love and romance outside the marriage.
• The Moon, which is the planet of mind, emotions, and feelings, is weak, debilitated, retrograde, combust, or afflicted by malefic planets. Moon is the significator of mind and emotions and any weakness or affliction to it can reduce the mental and emotional compatibility between the couple and make the person restless, unstable, and moody. It can also make the person emotionally vulnerable and susceptible to infidelity and extramarital affairs.
• The Mars, which is the planet of energy, action, and passion, is weak, debilitated, retrograde, combust, or afflicted by malefic planets. Mars is the significator of energy and passion and any weakness or affliction to it can reduce the physical and sexual compatibility between the couple and make the person lack vitality, enthusiasm, and confidence. It can also make the person aggressive, impulsive, and reckless and prone to infidelity and extramarital affairs.
• The Rahu, which is the shadow planet of disruption and instability, is placed in the 7th house or aspects the 7th house, 7th lord, or Venus. Rahu is the planet of illusion and deception and its influence on the 7th house or its significators can create confusion, doubt, and suspicion in the marital relationship and make the person dissatisfied, restless, and curious. It can also make the person attracted to unconventional, foreign, or taboo partners and indulge in infidelity and extramarital affairs.
• The Ketu, which is the shadow planet of detachment and isolation, is placed in the 7th house or aspects the 7th house, 7th lord, or Venus. Ketu is the planet of separation and liberation and its influence on the 7th house or its significators can create detachment, indifference, and isolation in the marital relationship and make the person disinterested, aloof, and indifferent. It can also make the person attracted to spiritual, mystical, or secretive partners and indulge in infidelity and extramarital affairs.