I dont think so.... There are a few more problems with this chain of events:
- The immortality contract was offered by the 100th floor guardian
- Arlene obviously accepted the contract
The contract may have allowed them to continue climbing as long as they did not conquer (maybe enter) the 135th floor. There is little information on the 135th floor so we don't know if it is the last floor or even special. All we know is that for some reason this floor was made the ceiling. We also know anecdotally that the guardians did not like what Zahard and company did to the tower and this may have played into the contract to ensure they did not continue further.
V does not take the contract likely out of hatred for Zahard while Arlene probably took it trying to keep the peace. Recall that she was always brokering peace between them. I think it is obvious that she later regrets this.
When Zahard stops the adventure and proclaims himself king, it is doubtful that Arlene is pregnant. Recall Zahard proposes to her at this time. I bet she actually does not become pregnant until well after V and her lost all hope of winning over the other warriors and continuing the climb. Meaning that Zahard killed her baby because he is the ultimate ass and the worst kind of person.
As for Gustang, I think he liked Arlene as well. He may have sided with Zahard but I think he hoped that things could have been reconciled. Gustang liked thinking of himself as the whale and probably did not understand V's affinity with the tower inhabitants. Then V does the worse thing ever and abandons Arlene. Arlene who has now lost it all and struggling mentally. This is where Gustang steps in and provides her with the information on how to leave the tower and cements his opinion of V as the worst kind of person. One who abandons someone who he supposedly loves in her absolute hour of need.
Ha ha...IMO