The real problem with incest is continuous inbreeding, except for very specific genetic defects the odds of problems even in parents-children or siblings, despite being higher than an aleatory encounter in general population, is low. Use of substances or pregnancy at older ages are way more dangerous than first generation incest.
>>25595584
Dude, the groom and the bride would pass easily as Brazilians, especially the groom, there are people with that appearance everywhere.