Max offer sheet to be signed by restricted free agent from Phoenix Suns

Deandre Ayton, a restricted free agent from Phoenix Suns has signed a max offer sheet that will go on for 4 years with the Indiana Pacers. The worth amount for this signing is claimed to be worth $133 million. However, it is said that the Suns will try to match the offer sheet once the signing is completed. It looks like the Suns are ready to do anything that could help them win if that meant paying a tax of up to $100 million. 

If Ayton signs the offer sheet, any sign and trade contracts around him will not be entertained. Therefore, the Phoenix Suns have an option where they can match the offer sheet or let their asset walk away without getting anything in return. What would the Phoenix Suns do?