especially in 2007, when his mom married a brazilian lawyer named joao paulo lins e silva. >> my mom said this is your dad. >> i knew it wasn't my dad. >> but you went along with it. >> yeah, i didn't want to make anybody mad. >> quietly, sean tried to settle into his new life in brazil, where his mom owned a successful clothing store and his mom owned a popular restaurant. po portugese became the primary language and there we trips to luks you'rous beach resorts. >> did you start to forget your dad in that period? >> no. >> never? >> never. >> even though you weren't talking to him. >> i mean, it's a big part of your life if you are a child. is your dad. you have to remember your dad. >> i think a lot of people think of a 4-year-old boy suddenly removed from home, and in a new place, would you start to forget. are you still a little guy, and you are saying no, it doesn't matter, the feelings are there, they are deep? >> yeah. >> then when sean was 8, things took a tragic turn. on august 22, 2008, hours after giving birth to a baby girl, his mom died. she was only 34. when david foun