So recently i got a girls number and we have good chemistry and are on good terms.

Second actual encounter with her: I ask for her name,We sit close, i kino,and build rapport. She has seen me talk to other girls in the class, my idgaf attitude. I literally ask her to do my work and let me copy it and as she sees me as high value so instantly complies (i think)

Compliance. Good sign, i use kino on her thighs, build rapport and eventually am horny so i tell her to give me her number.

she pauses and says "um, sure!" and puts it in.

I was thinking about whether i came forth as too forward or if she had no attraction - as with the kino she didnt reciprocate but remained submissive. but seems gave it as i was confident and asserted rather than asked for it.

I dont text her for a week and tell her i forgot i had her number , that this is my number. she replies,

i wait a few days and decide to be a bit arrogant to show her i have abundance. 'you know, normally i get girls numbers so i can cheat off of them"

she responds later with "i know, i have a boyfriend btw, laugh emoji"

Basically i did see her with this other guy and he is taller than me and probably stronger.

I know this is a shit test and could easily invite her over to help with 'homework' but want some advice, when fuck her eventually she might feel guilty and tell the chad bf. I dont know him personally so im thinking i should just do it anyway but i might get my ass kicked, any thoughts.