George Clooney & Amal Alamuddin -- BELLY Nice PDA Leads to Baby Talk

George Clooney and fiancée Amal Alamuddin were snuggling and kissing at dinner in Lake Como, Italy last week -- and some people think she was hiding something under the table ... as in a baby!

The inevitable prego rumors were sparked by another photo of Amal getting on a boat ... where there appears to be a bump. Could just be the wind though.

Then again, a baby might explain why Clooney -- the bachelor-for-life poster boy -- is suddenly walking down the aisle again.

Just sayin' ...