Is it acceptable?

I have a son who is 4 going to be 5 in January I had a shower when I was pregnant with him. My question is is it acceptable to have a second shower giving the length between my babies. I still have all the bigger things but I'm fairly certain they are all out dated. Me and hubs plans on replacing the bigger items and we don't want everyone to feel obligated to buy a gift. My mom is a firm believer in you get one shower but I feel like every life should be celebrated.