Don't you think it's suspicious that..

[alyaboulenein]

In the Cornered famous Detective! Two Big Murder cases (96 in the Japanese count and the episode where Ran suspects Conan is Shinchi and he ends up solving a case with his mother). There is a scene at the beginning where Shinchi's mom complains that Yusaku came back home with a kiss and she was suspecting he had an affair. Also much later Yusaku's Cold case (690-1) When Sera visits Shinchi's house she finds signs of a women having been to the house. We haven't heard about any of those 2 incidents since then, I'm PRETTY SURE they're relevant and don't think they're just random events, cause a lot of the time at the end of any arc they explain small incidents from previous episodes. Any ideas guys?

[Chekhov MacGuffin]

In the Cornered famous Detective! Two Big Murder cases (96 in the Japanese count and the episode where Ran suspects Conan is Shinchi and he ends up solving a case with his mother). There is a scene at the beginning where Shinchi's mom complains that Yusaku came back home with a kiss and she was suspecting he had an affair. Also much later Yusaku's Cold case (690-1) When Sera visits Shinchi's house she finds signs of a women having been to the house. We haven't heard about any of those 2 incidents since then, I'm PRETTY SURE they're relevant and don't think they're just random events, cause a lot of the time at the end of any arc they explain small incidents from previous episodes. Any ideas guys?

The woman in Shinichi's house who was with Okiya was heavily implied to be Yukiko who was helping Okiya with his disguise. (That said, she could be cheating on Yuusaku with Akai Shuuichi....)

[rohitjadhav42]

About the Woman in Shinichi's home, yeah She was Yukiko!

but about Yusaku, who come back home with a Kiss Mark, Is yet To be Revealed. I guess?