After scoring in his net, what is the secret of the enmity between De Bruyne and Courtois?

Belgian star Kevin De Bruyne scored the first goal in his team’s 4-3 victory over Real Madrid in the Champions League semi-final first leg.
This is the third time that De Bruyne has visited the net of his compatriot Thibaut Courtois, Real Madrid’s goalkeeper.
De Bruyne managed to score against Courtois twice before before the semi-final match, the first of which was when Courtois was a goalkeeper for Chelsea in the 2017-2018 season. Excellent.
And the second time was against Real Madrid in the first leg of the 16th round of the Champions League in the 2019-2020 season, when he scored the second goal against Courtois, to lead his team to victory (2-1).
Despite wearing the same jersey as the Belgian national team, the duo of De Bruyne and Courtois do not get along at all, so why?
The reason for the animosity of the Belgian duo, when Courtois, when he was a goalkeeper for the Spanish club Atletico Madrid, was involved in a sexual case with Caroline Lenin, the friend of his teammate, De Bruyne.
De Bruyne revealed this scandal in a book about his autobiography and said: “My friend Caroline traveled with her friends to Madrid, and there I began an affair with Thibaut.
The giant Belgian goalkeeper almost prevented him from participating with his country in the 2014 World Cup in Brazil, after Belgium coach Marc Wilmots stood by De Bruyne in this matter, during preparations for the 2014 World Cup, where he left Courtois’ fate in the hands of his colleague. De Bruyne, regarding participation in or exclusion from the tournament.
De Bruyne wrote in his autobiography: “The coach asked me if it was possible for Thibaut to stay in the team. “.
And Caroline Lenin, De Bruyne’s old friend, later came out to confirm the betrayal of the current Manchester City star with his colleague Courtois, after De Bruyne cheated on her and cheated on her with one of her friends.
Lenin said: “In 2012, Kevin cheated on me with my girlfriend, but I gave him another chance, but our relationship was affected, I traveled to Madrid and asked him to come, but something happened that should not have happened.”
And she concluded: “That night, Courtois showed what De Bruyne had not done for 3 years, with him I could talk about anything and he even made me a great meal, and then I thought De Bruyne cheated on me, so why not do that with him too?”