The literal couple in the picture look alike, right?
People resemble their blood relations because of similar genes but sometimes two unrelated people do look alike. Celebrities Omotola Jalade Ekeinde with Lisa Vanderpump and Kenya Moore paired with Yvonne Okoro are typical examples.
Couples sometimes look alike not because of blood but bond! I want to believe they looked alike from the outset not later in marriage as a result of proximity.