Don't take that line too seriously but interesting sure is one way to describe it.

[She is happy to have Archer back with her and she can't even try to hide it on her face right now or generally speaking either. Ooops. Insane or not but that is all that matters, them both being happy with whatever they have agreed here that is. Let's not talk about Archer though, let the grumpy asshole be wherever he is and so on.

Rin nods at being aware of that because yes she is even if she knows a few exceptions too. Wait, what? She could be the one guiding him...? Well be is new and all, maybe it is easier that way.]

Really? So you're more or less okay with submitting to my whims, that's good to know. We can do this that way too.

[... It's totally fine that she said a worse version of that to Shirou and Saber on her date with them. Making new memories of lines from that day to make those hurt less here. Cool. Insane is one way to describe her.]

You just happened to see me while I have nothing else but time for whatever I feel like doing. [She offers a hand towards him. Doesn't even give herself time to hesitate doing so, that would be a stupid internal fight between greedy vs tsun. It's just a hand, geez.] Well then, you can hold that while we walk.

[Easy, free Chroma, you're welcome or more like you can also help her becoming the richest Tohsaka ever?]