well, as far as i know, the only choice - until now - that affects history is to help or not the twins; the other choices have no impact on the story (even though they could have, like, for instance, declaring your love to Caroline or not).
in light of this and thinking that Icstor doesn't want to continue the whole story, i think that choosing between "blanket" and "non-blanket" is irrelevant: either way - i imagine - dad will leave the house because of the relationship or for his work (his company, after having helped the twins, is going bankrupt; instead if you didn't help them, his company is expanding, so he needs to work harder).
in a different dimension where the dev is willing to complete the project at 100%, i could say, on the contrary, that this should be a fundamental choice: if dad saw you and linda, for sure he will abandon the house, leaving to you all economic problems but your relationship with her will be completely free; if he didn't see, your relationship will continue but underground - and no economic troubles