Gisele Bündchen and Joaquim Valente are starting a family ... because she has a bun in the oven.
44-year-old Gisele is pregnant and expecting her first child with Joaquim, a source close to the model confirms to TMZ. Were told she's about 5 or 6 months along in her pregnancy.
Gisele has two kids that she shares with her ex husband Tom Brady .