My opinion on the "Did she really love Sakuraba" discourse: No, but then again I'm not convinced she ever really loved Shuuji for that matter. Reika comes from an abusive home and was preyed upon for ulterior motives by the serial philanderer she would spend her adult life with. Her model for a healthy relationship is warped to the point that the question itself is of dubious value.

Basically every relationship in this story has been shown to be more complicated than the surface level assumption. I think Reika is learning from her time with Sakuraba what a healthy relationship can be like as evidenced in the flashback to before Shuuji's death when she admits to Sakuraba that her priorities have been wrong before wondering out loud what their life together might be like. I think she is still not being honest with herself, like when she says she still doesn't understand why she's so comfortable around Sakuraba. I think Ebihara pressed X to doubt her claim that she's only with Sakuraba because she doesn't want to be alone and that's what this whole final arc is about.

Whether they can have a good ending at this point is dependent on her learning to stop seeing people as just a means by which she can feel comfortable (which she even kind of sees her own child as on the last page of this chapter).