Is there anything more romantic than a stroll past your ex’s house? Gisele Bündchen and her boyfriend, Joaquim Valente, were spotted in Miami water-biking together right past Tom Brady’s lavish mansion. The supermodel, 44, and the jiu-jitsu instructor — who have been dating since June 2023 — looked relaxed as they peddled the machines in the Florida waters near where Bündchen’s ex-husband, 47, resides. As OK! previously reported, the couple and Brady have been adjusting to their blended family lifestyle. “Tom just wants things to be cordial and respectful between him and Joaquim,” an insider e…