I'm pretty sure the referee didn't see that or didn't take it intentional, because otherwise he would undoubtedly be off the pitch. Either way, Pepe lost a lot today. Not only an opinion of a sane human being when the pressure is at its highest, but also the league will surely pay attention to his persona, which neither the club nor the player want to happen. Even Mourinho took a notice of that and during the press conference said that he needs to see the incident and if it was intentional Pepe will suffer repercussions which I doubt will happen since Pepe is mental and isn't likely to admit such a thing, even privately, but then again I may be wrong.