I don't know how many times Gea took a deep breath. He was unbelievably nervous at the thought of Randy's reaction, who would soon meet her half-sister.
Gea was actually angry at what Grisella did. But, still her little heart feels afraid and worried that her husband will lose control and then get emotional. Gea just found out that Randy can look so scary when she's angry. This is what he really wants to avoid.
Then, when the figure of the person he was waiting for actually arrived in the investigation room. Gea observed and could see clearly, the first thing Randy did was smile sarcastically. Trying to control emotions...