I just spent a few minutes trying to come up with ANY scenario in which it is acceptable to lock your child in their room, and short of a literal zombie apocalypse... nope. Can't think of anything. If you're a parent and you're afraid your child is going to have sex, there are multiple things you can do aside from turning their room into a prison cell. 1: Think about why exactly you feel this way. Would you do the same thing to your son? If not, then why? Why exactly do you feel that sex is a bad thing, and when did that association start? 2: Realize that your kid is probably going to have sex no matter what you do. Yes, there are some who stay virgins either by choice or circumstance, but most teenagers and young adults are going to do the do. The only difference your behavior can make is whether or not they feel comfortable telling you. 3: Talk to your ******* kid. If you're worried about STDs, pregnancies and social pressure, the best thing is to make sure your child has all the information available to them so they can make educated choices. Surprisingly enough, most people aren't keen on getting itchy genitalia or knocked up at a young age. Locking your child up is pretty much the most idiotic thing you can do. It's not going to stop them if they want to have sex, and it actually puts them in quite a lot of danger (aside from burning alive) because if they're ever unsure and being pressured by some douche, you can be damn sure they're not going to tell you about it.

Did it ever occur to him that your sister rebels BECAUSE he's overprotective? All he's going to do is drive his daughters to move out as early as they can.

Great plan...until you have a house fire and you die because you can't get out...parents can be so small minded (I'm a parent so I get to say that). Your sister probably rebelled BECAUSE your dad is so overprotective.

Break your window. Don't leave them intact until he unbolts them.

Yikes! Your family better pray there's no fire in your house. Instead of trusting you, your father may have sentenced you to a horrible death by bolting the windows.

I went through a similar thing, except my mum punished me by proxy for the things SHE had done as a teenager, rather than an older sibling (I'm the oldest). I wasn't allowed candles because she once set her curtains on fire by accident, I wasn't allowed to go to certain types of events because SHE would have got drunk, or had sex, or taken drugs, or smoked, etc. The twist for me is that it then flipped; my younger sisters had NONE of those same restrictions placed on them, because I was the most boring and non-rebellious teenager going anyway... well that, and I learned to be much sneakier. Sadly, in my experience being treated as guilty without proof can permanently damage your relationship with that parent... I really think the father in this case needs to realise that. As an aside, I'm really hoping that you have air conditioning in that house, or else you'll be boiling alive with unopenable windows in Texas over the summer months!

he's doing this because he doesn't want you to make the same mistakes your sister had because she's likely gotten herself into some trouble because of sneaking out. he's being a dad that's cautious, not overprotective.

dont worry my mum did that to me too and to make sure i couldnt do that she bolted all my siblings windows in thier room too haha

having done both of those things as a teenager and ending up with a pregnant girlfriend I really appreciate your father's concern but that didn't keep my teenage daughter from sneaking out incidentally my son is 50 now and an electrical engineer

Since you posted this, it's safe to say you know this is wrong. It's not healthy. I hope you can do well in school/work to get out of this situation you're stuck in.