Gisele Bündchen and Joaquim Valente filled in for Tom Brady on Father's Day ... looking after her and TB12's kiddos as pops made his broadcast television debut.
The supermodel and her jiu-jitsu trainer boyfriend had Benjamin and Vivian Brady in tow Sunday as they went paddleboarding for a second straight day in Miami ... all but confirming they are still together and going strong ... despite some rumblings they were dunzo.
On the contrary, GB and JV look very much so like a couple -- and here .