How old is the father?
Depending on his age you might be able to get him prosecuted and then you'll have more control over your daughter:
Statutory rape is prosecuted under Oklahoma's rape and sex crime laws. Penalties depend on the ages of the defendant and victim, and the conduct that occurred, as described below.
First degree rape includes consensual sex (which includes penetration, however slight, by a body part or other object) between a minor who is younger than 14 and a defendant who is 18 or older. Penalties include at least five years (and up to life) in prison.
Second degree rape includes consensual sex between a minor younger than 14 and a defendant who is younger than 18. It also includes consensual sex between a minor who is 14 or 15, and a defendant who is 18 or older. Penalties include at least one year (and up to 15 years) in prison.
Lewd or indecent acts with a child younger than 16 includes sexual touching (without penetration) between a minor who is younger than 16 and a defendant who is at least three years older than the victim. This offense may incur several years in prison.
(21 Ok. Stat. § 45-1114 & 45-1123.)