Rocky used to do this to me. for the first years I had him he's totally ignore me when I picked him up no matter who was dog sitting. He'd dance all over my brother (he was often my ride) and give him attention and kisses but would ignore me. he would ignore me for a day or two after that - but would stay closer than usually. Close but not right next to me
He's much better now, he'll come say hi to me and won't ignore me when I pick him up.
At least you know she had a great vacation too! that always makes me enjoy my own vacation more