It entirely would depend on the situation and if my partner were apologetic and genuinely wanted to fix things. Often when one partner commits adultery there is more wrong with the relationship that needs to be sorted out. My first marriage ended in divorce due to adultery on my ex's part, she did not desire to reconcile and was not apologetic. I forgave her the first time, but not the last. But she had approval issues and was a compulsive liar at the core, seeking out physical approval from anyone due to a poor relationship with her mother and never getting her approval on her life choices.