Speaking at the reception for the Harvard Center for Global Health and the Environment's Global Environmental Citizen Award, she told People: "Sometimes we have date nights, sometimes we have hikes together. The most important thing, I think, is to find the time to be with each other.
"We cherish the time we have together."
Gisele – who recently launched her own lingerie line in her native Brazil – also revealed she and New England Patriots player Tom, 33, spend less time away from home since Benjamin came into their lives.
She added: "We really do love to travel, but being parents, we travel less now then we have in the past. It's definitely more challenging travelling with a child."
The catwalk beauty admits she can’t wait to get home and see her son after a day at work.
She said: "There is nothing more rewarding then to come home and see them after a long day of work. As his mom, I think everything Benjamin does is cute."
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