It's clearly been nothing but smooth sailing for Gisele Bündchen and Joaquim Valente since having their first baby ... check out photos of the two from their recent boat day in Florida -- they can't keep their hands off each other!
The hot couple hit the waters in Miami over the weekend ... and the vessel's engine wasn't the only thing producing some steam.
Take a look, Gisele -- who was stunning in a black one-piece -- planted a few kisses on her shirtless man .