Discrete girl working near my place, got a BF, demands to meet in group

[spear_kin]

So I crafted the title so it says almost everything. If you want to know the specifics:

Got her number last week, she works a block away from my place. I went to see her some times there and she seems compliant with me and at least I feel we have sexual tension (girl's at least 8 hot). Gave me her shady Facebook, then her number. We've been texting.

Anyway she told me later she's in a relationship but that they see other people as well. But then proceeds to tell me that she doesn't want to be seen with a guy and be exposed. I ask her if that guy also sees other girls, she tells me he does, and that that is fine.

I don't want to be excesivelly pushy, but she says that it's fine if we meet with some of her friends.
I don't want to do that, and I want her to know. (side note: I sense that meeting her in group first isn't a good idea, but could it?)

I thought of texting her something along this line: "let's go to a place where we look like friends then" + ("if you'll feel safer", "where no one can see us")
The option of inviting her directly to my place seems too risky and difficult to pull, so I steered away from that (I ensured she knows I live a block away tho).

Any insights on this?

 

[spear_kin]

UPDATE:

I went and see her one time after our last interaction. She didn't reply to my last text but when I show up in her work she gets up, goes around the counter and salutes me with a kiss. Then she tells me to go outside and we chat for a while.

In the exchange we laugh, she tells me something about her work and that she'll probably be busy that night. I don't go for the meet since I've wasted a bullet already and I don't want to do it when she clearly tells me she probably won't be available (specifically, she asked if I was going out that night. I tell her that I probably wouldn't. Then she tells me that she neither, but that she was gonna see her boyfriend since they'll travel to somewhere else next morning), but I still state that I bought some stuff to cook at home for myself and any possible companion. There's no answer about that so after recollecting some data from her I just go.

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Like, wtf should I do? I'll just go and try to execute a move next time I go to see her but I'm not reading wtf is this girl up to. All I know is there's chemistry and that I got to do something with it.