Kaoru is being extremely selfish here, not only she's "using" Uta to get comfort, she's ignoring her feelings and efforts to forget about her and move on, such behavior will only result in Uta getting more hurt and thus will still have lingering feelings despite her efforts to turn the page, she said in a previous chapter that she will love kaoru forever although that can be true it simply won't be the case in a couple of years, she can still have these affectionate feelings towards her sister in law but they can't be as intense as they used to be. Uta is still young and as the title suggests we're not getting our girl on girl action chapter albeit we all want one, i would love to see a new love interest for our poor Uta just so she can close this chapter of her life and strive for someone better.