Don't want a baby shower

Katie
Ok so my friend wants to throw me a baby shower but thing is my other half doesn't want to know the sex so I'm telling those who want to know but nobody else and with fb + shower he will deffo find out. I know she means well but it's just not me, I'd rather just have a pamper night or day seeing as I'm shattered by 9pm these days. How do I let her down gently?