I am in the same boat. My ex-husband and I had two kids, and now I am happily married with a new baby on the way. My kids are 10 and 8, and my shower was ten years ago.
So much has changed since then...technology has changed...safety requirements have changed. My husband and I aren't living without and are fully able to purchase things on our own. But there are genuinely people out there who DO want to celebrate a new baby by hosting a shower. There is nothing wrong with people hosting a shower, or you even hosting one for yourself.
To the subsequent posters, the purpose of a shower is to celebrate the impending birth of a new baby by showering the mother with gifts...if you don't want to attend a 2nd shower, you don't have to, but if you were really a friend...wouldn't you pick a little something out for your friend anyhow? I don't care what number kid my friends or family members are on, I am still going to get them something for the wonderful event.
To the OP, people are offering - go for it! And don't listen to all the other crazy posters on here!