Hmm, I try to keep Clara in some kind of limits where she should behave like a "good girlfriend" but with each update it's getting harder.
Now, either you skip content and she acts like a nun, or you play her games, and she teases you and creates naughty situations.
Personally, I no longer see the balance.
As I mentioned in several earlier posts, a big problem is the current lust score (the one on the kiss lips). Depending on the situation if it is greater than 7-8, the person in question gets aroused and can be influenced towards sexual acts or starts so him/herself.
If you want to keep your girlfriend or friend (e.g. Amy) loyal, you either keep this score low or you have to save them.
For Clara specifically, there are some events counting more, e.g. dancing with her at the early frat party or keeping the grabbers on the bus at bay repeatedly, which fortify her loyalty and liking of you. It sometimes lowers slut and current lust level, in others there is no effect on stats, but it seems to flag towards loyalty, since Clara then cuts off stuff on her own, e.g. at the bowling.
The biggest problem for us players is a situation in which Clara has high current lust, we are not right there and the other person preys on her kindness and/or will to save her Dad.
As I wrote earlier, I found it easier to have a loyal Clara who is on the daring dress/show off path. That functions quite well, even if she can be a tease then. This seems to be a trait of her that is pushed by the dev a bit, since the Clara of "12 Days" has it too.
The "12 Days" Clara can be quite a tease, gets off on showing off, but she has an upper limit of what she does with persons not her boyfriend/husband: That is a handjob. As Clara says in "12 Days" to Amy, "it is just a handjob, that is not cheating." That is very specific and seems to be the red line Clara nad her boyfriend have agreed on. Despite Clara having the option and possibility to go further several times in "12 Days", stops at the handjob as the max.
It seems the dev tries to form Clara towards this, at least partially depending on player input, in "Misfits" as well.