Man, when she comes over kino escalate and then kiss.
You can also play the game where you ask each other questions. If you ask her a question, she can't ask the same question back and vice versa. It should also be allowed to pass a question so she doesn't feel pressured. You can tease her about her answers and use it as excuses to touch her, push her, etc... Start with innocent (but interesting) questions and escalate to more sexual stuff. Somewhere in the middle you could for example as if she's ticklish and then tickle her to see if the answer was true. Eventually you can ask her how good of a kisser she is and then whatever she says you can tell her "let's find out" and then go for it.
Otherwise if you feel the sexual tension is high enough, you can literally ask her if she wants to kiss you. If she says no, you tell her "I didn't say you could" in a teasing way. If she says maybe you say "let's find out" and kiss her. And if she says yes you don't need to say shit, you just go for it (or maybe go in I-forgot-how-much-percent and let her kiss you).
And since you're already together at home and kissing it should be real easy to take it further until you got your dick in her. Remember to use a condom
