Re: Statute of limitations
it is difficult to guess as to what may be charged without knowing exactly what the girl would tell the authorities. Without that, I believe the state would have at least 1 year to initiate charges and very possibly 3 years. In some circumstances, they would have up to 10 years to inititate charges.
Re: Father Trying to Have Sexual Relations With 18-Year-Old Daughter
Also if you are advising this woman, You should let her know to report it to Texas authorities as soon as possible. The longer she waits and the more people that talks to her about this the fuzzyer the details will get. If she is going to report this at all ( and I realize this will be one of her most difficult decisions) she needs to contact the police as soon as she is up to it. You don't seem to know if an actual crime has taken place thats why the police should be brought in to find out. Good Luck
Re: Father Trying to Have Sexual Relations With 18-Year-Old Daughter
If she consented (which would still be sick) this would be considered incest. Incest is a misdemeanor in Texas.