Chat had the audacity to blame Phob for them having to sell the palace when he's the reason they had to sell it because of him having to pay back the money he stole. People like him love putting the blame on someone else and never take accountability for their actions. Then, earlier in the episode, the grandma tells Phob to not go too hard on Vasin and Chat because they are still her son and grandson like Ma'am, with all due respect, f*** your son and grandson, and she's gone now. It's not like she can do anything about it if he does.
Now how tf is he's going to blame Phob? It's her own fault. She knew she was sick, didn't say anything about it and that man accidentally hitting her with his car had nothing to do with Phob. She asked to see him, not the other way around. She should've just stayed home and call him over when her son wasn't around.