What to do now!

I have a younger sister. We do share a very good relation. I am the closest person to her among the family. But she doesn’t share all the things (relationship, crush) as she is a private person. I have a strong crush on her. And once I asked her to kiss as an experiment. But she refused. This the incident of two years ago. But we didn’t have any problems. Now, she even let me touch her when parents are not around. I touch her inappropriately while doing mischievous activities. But she never reacted.

I feel she knows I'm attracted to her. And she allows it to some extend. But I think she will not agree to kiss and form an incestuous relationship.

Now what should I do? Anybody with any advice

 

You should respect her limits and not try to force anything on her.

 

I am not forcing anything. I am just asking what should be my next steps as now-a-days she is allowing me to some extend.