How do I help my step daughter better?

I have no bio kids, so my step daughter (6yo) is my only child, but at her mom's she has a brother 2 years younger. When my husband and her mom separated her mom took her as an infant to West Virginia and just never came back and then a guy messaged him with evidence of her cheating. To this day, they live in West Virginia and us in Texas. Before now, we would switch off every few months and all been on good terms. Now, my daughter is in Kindergarten and it isnt so easy to go back and forth for her like she's used to and she was doing school in West Virginia and my husband and I went up there for a week to visit (we thought we'd have to go a whole year without her!) and her mom asked us to bring her to Texas with us for the rest of the school year, so we got that figured out and now she's enrolled here in Texas and it's not even been a month but she's getting bored and of course missing everyone one (she has an iPhone that works on wifi and she calls them on FaceTime and stuff often we never keep her from calling or messaging which of course all of that is so different from having the person with you) I don't know what to do to make this easier on her. Her mom wanted her here cause her brother is "a lot" for her, she says they fight all the time and he is especially mean to our girl and our daughter wanted to come down to Texas cause she missed everyone here and wanted to try school here too,so everyone was on board but now I feel so bad and like we aren't doing enough or are hurting her. She doesn't cry or anything but I can't imagine it's easy we talk a lot and she's torn too, how do we play it out? Just see how the rest of school year goes and then next year she decide where to go ALL year? I can't imagine the schools would be happy with her switching states mid school year every year either especially with state testing and all.