file charges against SD for false rape claims.

Both of those kids could get in trouble for the underage sex tape.

Rape is not some game.
Your SD is really twisted: if she was raped, she should press charges, if she wasn't, she should be prosecuted for wasting police time or filing a false report - if this is what happened.

Your DH should see the parents of the boy: do they know he is accused (maybe falsely) of rape?
What if their son is a rapist?
This is all just sick and twisted and your SD needs serious psychological help.

I understand that people are traumatised by rape, but refusing to report for whatever reason, lets a rapist get away with it and endangers further possible victims.
 

After BM here had an affair and DH found out, she suddenly reported being "raped" by someone posing as a police officer. She wouldn't file charges, wouldn't do the rape kit, etc, didn't want to pursue it.  All of the sudden, she was again the victim and DH was focused on helping her rather than being angry about her affair.

He believed that story until about 5 years ago. The minute I heard it, I knew it was BS and that she'd done it for sympathy. One of SS's therapists also thought it was BS.  DH was shocked, it had never occurred to him that she would lie about such a thing. Now he believes fully that she lied about it, AND, during the custody battle, she told the court, and SS, that DH had "hired someone" to rape her.  IMO, BM is NPD/BPD.

The focus on women being sexually assaulted and harassed is important, but it doesn't mean that every allegation of rape is true.  There always have been and always will be women who falsely accuse men of rape. Yes, it's a small percentage of women who allege rape and sexual assault, but it exists.

I hope this gets sorted out in a way that allows SD to be held accountable if she is lying.

I'd make sure the detective has a copy of that tape. Kid doesn't deserve to have his future potentially ruined over a lie (if it's a lie).

Here's my guess.

SD likes this boy.  SD entices him over with whatever "promises" she thinks will get him there.  She flirts and likes the attention.. but actually isn't interested in "doing it".. But, the boy feels he was invited over for THAT.. so he won't take "no" for an answer.  She talked the part.. she acted the part.. she dressed the part.. but all of it was to get his attention.. at the bottom of it "doing it" wasn't her goal.. his attention was.. and she was doing whatever she could to get it.

The fact that he bragged about his conquest.. and probably didn't act "boyfriendish" to her.. well.. that gave her a good excuse to make an accusation.

Now.. this accusation wasn't meant for the police.. remember she didn't want the kit.. didn't want the police.  That was pushed on her.  She just wanted to save face and be excused from her ill advised behavior... but she still pined after this guy.

I just need to say a few things.

1. Anyone can change their mind at any time during any sexual encounter and say, "No." 

2. Girls who have been sexually abused by family members or trusted authority figures sometimes accuse others of the abuse because of trauma.

Is this girl in therapy? Someone has does something to her to inflict this level of damage. Healthy, untraumatized girls/women do not cry rape. She needs serious help and much more supervision than her parents are giving her.

for the county told me that if he had to estimate,  about 80% of rape claims are false.

1.  they use it as an excuse so that their BF/SO/DH doesn't get angry at their affair

2.  they have "buyer's remorse" after the consensual deed

Unfortunately I have a feeling this will be my SD in a few years.  She is currently faking taking her meds to stay sick and BM is a nutcase too.  I'm over the constant drama that they put us through.

I feel for you.  I hope that if she was really raped she will get the help she needs.  I'm guessing based on the info this is a boy that cries wolf type of situation.  My SD does this a lot.  Gets caught doing something she shouldn't so she throws someone else under the bus to take attention off herself and become the innocent victim.  I won't leave her alone with my son for this very reason.  She doesn't care about ruining other lives just getting what she wants...attention and sympathy.

See this is the problem with false rape claims, it negates and defeats the actual victims of rape, your SD should be brought up on charges of defamation of character and should be forced to serve community service working with victims of actual rape.

Meth Mouth is the same way, she got caught having an affair and cried rape, then she claimed her second ex raped her, then her dealer, then she was gang raped, it was disgusting to hear Spawn talk about her poor mother and how she was always a victim.

Does anyone else think it is "different" that SD is having her dad rush to "save her", go to police, etc and not having her mom do all of this? I mean, she told her dad before mom, right? And she ws at mom's house...and mom was there...but she told dad first? 

Is she trying to get attention from dad?