I need advice

My SD is 5 (almost 6). Every time she is with us she is wanting to sleep in our bed. We tell her she can fall asleep but we will move her as soon as she’s asleep. She cries because she doesn’t want us to she wants to sleep with us all night (🙄- I blame her mom for this because she spoils the crap out of her to make us look like the bad people). Anyways, we only get her 10 days out of the month (WE HATE IT by the way wish we had more time) so it’s not really enough time to start something but at the same time I feel like we need to break the habit. We move her to her room and about 2 hours later she’s in our bed. We move her again and 2 hours later again in our bed. It’s like this EVERY night she is with us. Does anyone have any advice?