What is the punishment of someone who emotionally cheats on their spouse?

As well, what is the punishment of someone who cheats on their spouse by having sexual conversations with and sending intimate pictures to someone else?

1- There is no punishment for that. As long as he is being good to his spouse, not oppressing her and observing her rights, he would not be punished for that.

2- If this person is not in a halal relationship (marriage contract), then it’s sinful and Allah will severely punish him if he does not repent. One hadiths states if he simply jokes with her, on the day of judgement he will be locked up for 500 years for every word he joked with.