Gotta love how people are saying a lesbian/yuri character is somehow being forced into the story, despite the fact she fits in the story thematically. A story about a marriage of co-workers who are coming to eventually love each other added a side character in an unhappy marriage as she longs to be with the one she loves and at the same time, Honjouji starts longing for Takuya without realising she's starting to fall for him.
The themes of this arc match and Claudia matches the story perfectly. Just be honest with your biases for lesbian/yuri characters instead complaining like pussies with excuses like "iT's fOrCed" because it's not.
On a more positive note, it was nice seeing wholesome and more realistic lesbian/yuri character in manga that doesn't have an irrational and violent man hatred.