I think there are some mentions if the MC is with his sis + mom, the kate part also depends I believe if he's with Kate, was with Kate but MC made them break up, MC with Kate or if MC with Kate + letting him sleep with Kate lastly I also think he might mention Ophilia if your sharing her with him. It's kinda like when having threesome or letting Rick sleep with Kate in the barn will have different dialogues depending on what happened previously between the two.Just found out that when you renovate your own house, Rick will mentioning girls whos with you at the moment.
When it's Mira he will be supportive of your relationship, with Kate he will be sad because he likes her. Are there other girls he will mention when renovating your house? Really cool
But in short I believe he will talk about Mira, Kate, Arianna, Verena and Ophilia since those are the five he will know about and can even be involved with to some degree.