W has been gone for 4 days with kids and did not tell me she was taking them. I found out they we staying at her parents. My oldest D has a Christmas concert today. I just got a TM from W "We will be at the house tonight to get ready for Xmas concert and stay the night"

Any thoughts on how I should handle this? I feel like saying something like this. "The kids are more than welcome to stay the night. But I hope you can respect my space at this time"

Hopeing someone has some input on this.
Thanks

M:35 W 31
D's:6, 4 & 2
T:9 M:7
ILYBNILWY- Mar/14
DP Served Dec.17/14