Question: In Florida, if a spouse commits adultery, could that result in higher alimony?
No. The courts have been fairly clear that the existence of or the amount alimony should not be set as a punishment for the bad acting spouse.
Alimony is based on the receiving spouses need fro the alimony and the paying spouses ability to pay
This means that if you had a pretty good alimony case, you should not expect a higher alimony amount just because your spouse committed adultery.
Similarly, if you had a weak alimony case, the adultery would not make your case any stronger.