2nd Baby..Shower?

Okay, so my daughter is 4yo and since we didn't think we'd be having another baby, I don't have most of her stuff & what I do have, is completely girl themed (clothes, toys, etc). Well baby boy is due in July, and some co-workers have brought up the idea of having a shower. Is this okay? How do I go about mentioning this or do I at all? I am in desperate need of everything!!! A shower would be fantastic, but I don't want people to feel obligated. Thank you in advance for any & all advice.