It is wrong to cheat on your romantic partner.
Sandra is in an unhappy relationship with Jeff who is emotionally abusive and uncaring.
Sandra wants to experience a loving relationship.
Sandra ends her relationship with Jeff with the help of her best friend and begins looking for a better partner.
Sandra begins an affair with Marnie who she meets online and makes her feel special.
Sandra begins leading a healthier and more fulfilling life without Jeff.
Jeff lashes out violently against Sandra when he finds out about the affair.