What do you say to your wife when she's sad ? [I Marriage]

My wife is 7 months pregnant with our first baby she's been very depressed here lately she just lost her little brother in December he wasn't really little but he was 4 years younger than her she called him her baby brother even though he just turned 24 before he passed they were very close to each other even though he was her step brother they were still close I see why she was obsessed with him because he and his dad were from England she loves English guys I see why she loved him so much they were so close it was like they were dating more than brother and sister. They're parents were married for about 15 years. All she's been doing for the past 2 months is crying for him he was excited to be an uncle she said he was gonna be one of the first ones to hold his niece when she was born. She said if we have a son one of these days she's gonna name him after him. How can I help her feel better ? What should I say to her ?