Hypothetical: Would you forgive someone under these circumstances?

Suppose your long-time partner starts behaving very erratically, and engages in a very public, hurtful, and embarrassing affair. As you are packing up your house and family to leave, your partner comes home from the doctor and explains that s/he has just been diagnosed with a brain tumor. The tumor is removed, and your partner is both very sick and racked with guilt.

Do you think you would be able to forgive your partner? Would you want to?

Inspired by an ostensibly true story. A similar, verified case of a pedophile whose urges were attributed to a brain tumor was documented a few years ago.