"They are so happy and excited," an insider told the mag. "They are in love, and this news makes things even better."
This new baby will have three older sisters; Sam and Lola, who are Charlie and Denise's daughters, and Charlie's 23-year-old daughter, Cassandra, with ex-girlfriend Paula Profitt.
Denise should look into returning those voodoo dolls -- they are obviously not working.
UPDATE: Charlie gave this statement on Monday:
"Brooke and I are thrilled! She's the best stepmom Sam, Lola and Cassandra could ever hope for. Seeing her love and affection with those three, I know she'll be an amazing mom. Unless I bat 100 percent, perhaps a boy awaits us."