Gender disappointment

I can’t believe I’m writing this but I need a little advice. We have a one year old daughter and now I’m pregnant with another girl, I also have a 10 year old stepdaughter. we just found out and my husband is having the worst gender disappointment ever. He is 40 and doesn’t want anymore because he doesn’t want to be old having children. He was set on a boy and I just feel so sad that he reacted this way. He left all day today and when he got home just went right to bed. Will this go away? I keep trying to tell him it’s gods timing not ours but he’s not here for it. 😩 I’m so excited for another girl, I would’ve loved a boy but it’s not meant to me apparently this time around, just feeling so sad now. 😭😔