The black and white photo shows Mendoza holding her growing stomach while in a bikini on the beach.
“I’m so glad you came into my life. I’m ready for where this journey is gonna take us together. #familyfirst.”
Fernandez was killed in a boating crash off Miami Beach early Sunday.
Fernandez was with two friends when the 32-foot SeaVee that they were traveling in hit rocks and capsized during a boating trip, according to Florida Fish and Wildlife Conservation Commission officials.
The boat was found upside down. Two bodies were found under the vessel and one was found in the water by divers.
The boat was traveling full speed and was demolished. There was no evidence of alcohol or illegal substances being a factor in the crash.
The Miami Marlins released a statement about Fernandez’s death saying that they are “devastated by the tragic loss of Jose Fernandez.”
“Our thoughts and prayer are with his family at this very difficult time,” the statement read.