Asking Girl Out WITH her Siblings?

[Phozen]

There's this girl who I think shares some interest in me. We went out once (casual dinner night), but we've been talking online/texting for a while. I'm thinking of asking her to a daytime activity that's coming up, and I had this strange idea of asking her if she wanted to bring her siblings along as well (the siblings are all around the same age as her). My goal is to just know her siblings better while having a fun time. Am I giving off any hidden messages that I might not be aware of? Should I hold back on getting to know her siblings until I'm more closer to her?

[lovebroken]

How many siblings does she have? and why her siblings over just her best friend being included? If she has four siblings and then herself you won't get to talk to her much, maybe include only one or two, depending on how many brothers and sisters she has.