The choices should be pretty straightforward, IIRC. If there's one in particular you're not sure about, I can tell you which choice gives points. But as a rule, picking to kiss, compliment, or do something lewd will give points. If there's a choice between either of the girls or saying both, it's as expected: add points to the one girl you pick (+2, I think), or split the points if you say both.
Also, don't forget that the daughter is new to love and lewd things, so take baby steps with her. Specifically, I'm thinking of the truth or dare game. She does get interested in going further fairly quickly, so you shouldn't need to be too cautious really, though. I don't remember there being any choice that lets the MC go crazy sexually with her, so I don't believe you'll need to worry.