my father-in-law had a heart attack

Last night, I got the news that my father-in-law had a heart attack and admitted to the hospital. I saw my husband's face is very sad. I want to entertain, but I do not know what I should do. My husband was very sad, and I do not dare talk to my husband. This morning, my husband went to visit his father. My husband asked me to stay home, because on Monday my child take the test class increases. But, on Sunday, me and my parents, plan to visit my father-in-law.