Mother in law nightmare

In need of some advice,

Currently planning a baby moon with husband and 2 year old son, we’ve actually never gotten around to having a holiday just us three as his family or mine have always tagged along, we both work 7days a week and rarely spend time just us three which is why I think this holiday is sooo important for us,

This eve my husband mentioned that his mum and Dad are going to come, I was kinda shocked.... I said how I felt and that I’d love to just have the time with them,

He said I’d have to let them down and that they would be devastated and that they would know I didn’t want them there etc...

am I wrong to think that it’s not down to me?!?!

If my mum assumed she could invite herself I’d let her down gently myself,

MY MUM / anyone with a brain WOULD NEVER invite themselves on holiday!?!

He’s now not talking to me, I just feel second class next to his family, he constantly puts them above me & our child.

I need to know if I’m being unreasonable as he’s making me feel that way.