Gisele Bündchen, Jiu-Jitsu instructor Joaquim Valente returns to Costa Rica

Gisele Bündchen and her jiu-jitsu instructor are reunited in familiar territory: her home in Costa Rica, and she gives him a glimpse of what her ex, Tom Brady, might be missing.

Gisele showed off her perfectly toned abs on Monday as she exercised with Joaquim Valente...walking with two super cute puppies. We know GB retired from modeling years ago, but those abs still scream supermodel.

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Costa Rica is becoming a favorite destination for Gisèle and Joaquim...we saw them there a few months ago, while they were riding horses through the jungle together.

Of course, Gisele and Tom used to frequent CR when they were married... for family trips and romantic getaways - but now it seems Joaquim is enjoying Gisele's slice of heaven. We are talking about his property there.

The trip to Costa Rica seems to lend more credence to the idea that Gisele and Joaquim are more than just friends or jiu-jitsu buddies... but they still aren't doing anything official. Or unofficial, for that matter.

Gisèle's camp claims Joaquim accompanies her on family trips to train her and her kids...but they do a lot without the kids who, at least, look like a couple .

Costa Rica seems to be the territory of Gisèle and Joaquim now. But, Tom has his cats !!!...