Gwen Says No To Caffeine, Yes To Baby?

Gwen Stefani accompanied her hot man Gavin Rossdale to Starbucks yesterday where he got coffee -- two in fact -- but she left empty handed!

With all her loose clothing of late, we've long suspected she could have a little Rossdale cookin' in the oven. And when you're preggers, you're not supposed to drink caffeine!

So is this a tell-tale sign? Course, there is always decaf... so was Gwen just being lazy and making Gavin carry her coffee? Or is she staying off the juice for the new little guy (or girl?)

Sidebar -- how cute is it that they still hold hands after all these years?