User blog comment:Crimson and Darkness/Shin DxD 3 discussion/@comment-2806:261:401:1AFC:C56F:2C92:F59F:2B2E-20190919045423/@comment-2208155-20190919094039

Nope. Ishi choosed Issei for her in the same moment that put her in his house and even made her continue living here in SHIN 2. When all her reasons to continue living here(participate in the tournament) finished.

And for what happened in SHIN 1 with her during Nyx fight. Rias probably sees her as one little sister now making her visit the shopping mall with her, Issei and Kunou(Dx.4) and saying that she wants one daughter after watch Lint and Kunou together.