If that were really the case, there was significantly more money in her bank account. This is not yet taking into account the fact that she has her own secret account from which she has 10 million a month. Most likely, she has access to a copy of Iwabuchi's server, but no more.
If we talk about a kiss with Singo, you can remember a lot of similar things that Soske did. And he did some of them before he saw a kiss with Shingo. Even the kiss with Singo could have been Rika's reaction to what she saw in the bar (Soska's actions). He came to that bar with an "annoying bug", then went to the room with another woman and in the end he chose a "bug", not his wife. Doesn't that look like adultery? And we don't know when the video of the kiss was filmed before the actions in the bar or after. I mean, when Rika saw Soska's actions in the bar, the video hints: "if you have a mistress, I'll have a lover too."
As everyone has already realised, Soske went to look for Rika and he will do this in chapter 98. I think that Soske will not meet Rika in her room, but will meet Misato, who will have a copy of the server. Misato will give Soska not only the server, but also the message that Rika left. With the help of this copy, Sosuke will finish Iwabuchi.
What can Rika do in Iwabuchi's structure? It's very simple, it accepts the topics of secret accounts, as well as themes for new videos.