They are partners and I think he has a right to question Ty about the money. Plus he knows he's in debt so is scared of the business. Ty has never been smart anyway.
I feel even more disgust towards Ty when he was insulted about Sophie and Kev planning a holiday! So what if Kev said he didn't have money, he just didn't want to give it to you, you fool Ty! His own daughter is more important! Tyrone is a very rude and spoiled 'man'. Don't like him at all..