my 8yr old daughter dreads sleeping at dads house

Hi there, i’m Dad, and I’ve come here for some help. In 8yrs i’ve never had anything I couldn’t handle up until now, and i’ve reached a breaking point and i’ve realized maybe I don’t have all the answers, so any advice would be appreciated!Me and my daughters mom have been split for 6yrs now, and there really hasn’t been any problems until recently. At my house for the past month or so, (i have her 3 nights a week) leading up into the evening she will start to get anxiety about having to go to sleep and will say she misses her mom. It’s currently 6:35pm and she’s been at my house now for about 4hrs and she just had her first breakdown where she cried and says she misses her mom. this will continue up until bedtime, and then after i get her settled down she will come out of her room and cry and say she misses her mom. last weekend she had me up past 1am after a 9pm bedtime. in doing so, she stresses herself out so bad that she will get an upset stomach and have to go potty a lot.I’ve had the talk with her about why she misses her mom so much and it really comes down to her not being able to spend as much time with her mother as she likes because when she is at moms house, she’s at work and a relative or friend is watching her so she’s not getting that quality “mom time”, and i’ve had discussions with her mom and she’s put in more effort but she can only do so much, she can’t just stop going to work after all.And when she is at her moms, she never cries about missing me or wanting dad. We spend quality time together, we play, we try to go out and do fun activities and no matter how good of a day we’ve had, every night recently has been awful.I have also discovered that when she’s at her moms house, she sleeps in bed with mom 99% of the time, and for the past 2+yrs she’s slept in her own bed at my house. but not until recently has she had issues other than the occasional bad dream and what have you.I’m just worried i don’t know how to help her so any advice would be great. sorry that this got to be a little long, but thank you for your time and help! via /r/Parenting https://ift.tt/2FW998q