The 2002 Flordia Title XLVI, Chapter 798.01 provides:
"Whoever lives in an open state of adultery shall be guilty of a misdemeanor of the second degree, punishable as provided in s. 775.082 or s. 775.083. Where either of the parties living in an open state of adultery is married, both parties so living shall be deemed to be guilty of the offense provided for in this section."
If the statute hasn't been repealed or amended, it would appear that both Mr. Schiavo and his pillow mate are both criminally liable for indulging in their mutual pleasure, while Terri lay suffering in her hospital bed.
"In 1992, her husband successfully sued doctors who were giving her medical treatment at the time of her collapse. She received $700,000 and he received $300,000.
By 1995, Mr. Schiavo was living with another woman, with whom he had a child, according to a 2002 interview he had with CNN. -- Julia Duin, The Washington Times, 01 Sept 2003 "Gov. Bush backs parents in fight to keep life support"
So far it seems that the statute is still on the books. As of 2002
CHAPTER 798
ADULTERY; COHABITATION
798.01 Living in open adultery.
798.02 Lewd and lascivious behavior.
798.01 Living in open adultery.--Whoever lives in an open state of adultery shall be guilty of a misdemeanor of the second degree, punishable as provided in s. 775.082 or s. 775.083. Where either of the parties living in an open state of adultery is married, both parties so living shall be deemed to be guilty of the offense provided for in this section.
History.--s. 1, ch. 1986, 1874; RS 2595; GS 3518; RGS 5406; CGL 7549; s. 772, ch. 71-136.
798.02 Lewd and lascivious behavior.--If any man and woman, not being married to each other, lewdly and lasciviously associate and cohabit together, or if any man or woman, married or unmarried, engages in open and gross lewdness and lascivious behavior, they shall be guilty of a misdemeanor of the second degree, punishable as provided in s. 775.082 or s. 775.083.
This is from this website
http://www.flsenate.gov/Statutes/index.cfm?App_mode=Display_Statute&URL=Ch0798/ch0798.htm