Show Off How in Love You Are - Spy X Family Episode 9 Reaction

The whole sibling complex thing isn't an incest or sexual thing. At their core sibling complexes come from a fear of losing your sibling and being overprotective. They're more common with characters who lost their parents at an early age, the trauma of going through that leads to deep seated abandonment issues. In Yuri's case he pushed Yor to find someone because he wants her to be happy, but actually seeing her have a family and kiss Loid makes him feel like he's being left behind by the woman who raised him. Then there's the over protectiveness that comes from him wanting to protect his sister the way she protected him. There are also cases of sibling complexes where romantic feelings are involved, but they're much rarer than people think. Likely because some people have a tendency to assume that everything in anime is sexual. Some good examples of non-romantic, non-sexual sibling complexes are Yuri, Gauche from BC, and Lance Crown from Mashle, while a good example of a sibling complex with actual incest and romance would be the main characters in Irregular at Magic High School