Gisele Bundchen had her sister Patricia by her side as she headed into the airport in Rio this afternoon. She was covered up in a loose-fitting top and a scarf for her travels to NYC, further fueling rumors that she may be expecting her second child. Sources say that Gisele is pregnant again, though she has yet to comment on the news. She did, however, show off what could be a tiny baby bump at an appearance yesterday to promote the launch of Top Cufa's model search. Gisele also stepped out for the Green Nation Fest during her stay in Rio de Janeiro. While she was overseas, Tom Brady was busy fulfilling his philanthropic duties for the Best Buddies organization in Boston.