Erik had tried to track his sister down in the intervening years without success.
But their paths would cross again when Erik, who had returned to Holland to study, joined dating app Tinder and swiped through looking for matches.
It helped single parents Brian and Cathleen meet – and reunited two long-lost cat brothers in the process.
They each lived in Fairfax, San Rafael, and Petaluma.
But Adriana’s refusal to give up the search for her mother led her to calling into to Brazilian radio station Globo Radio, and eventually managing to speak to her mother on programme, which specialises in finding lost relatives, the Mirror reports.The 24-year-old matched with a 22-year-old woman on the app in early April and the pair began tentatively chatting and flirting in direct messages."The first time I swiped her profile I had absolutely no idea," de Vries told "In our next conversation, I started to get some clues and figured she might actually be my sister.This kind of shocked me, so I decided not to contact her for a few days," Erik said.