I don't think Maude has forgotten Arland. I think she just has her priorities straight, which are, Helen first, then everyone else. Even the man/vampire she loves. AND... she knows that if Arland had been able to voice an opinion at that moment, he would have told her to run to her kid and deal with the repercussions later.
If she didn't think Arland was the kind of man who would rather she leave him alone and unconscious when her daughter's life was in danger... she'd be back on Earth pestering Dina about Sean and plotting how to find their parents.
So, yes, she'll be rushing back there sometime in the near future... but first she needs Helen out of danger, and then she needs to ensure that rushing back to her rooms isn't going to trip some sort of trap or otherwise give the unknown antagonists a better position. Because vampires are conniving creatures, but they aren't omniscient... so Arland being unconscious in Maude's rooms could be something unexpected that will give Maude and any allies she can vet quickly, an element of surprise.
