Answer: Gambling
Explanation:
Gambling is the act of incurring money or a valuable item at an event or an occasion with an uncertain outcome and with the intent of winning.
Depending on how Jim's relationship with his ex-wife ended, through bitterness or a mutual agreement to be friends, he could either be happy or sad. If he was in between, he probably would've felt uncomfortable, because he neither cared enough to find out before his son but wasn't as cruel to say he didn't care.