Here is the thing with chinchillas (I'm going to assume you paid some attention in whatever sex ed class you've taken as a 14 year old): females have uterine horns. That means that their uterus is basically split in two. We'll play the hypothetical game: hypothetically, your chinchilla is pregnant now, and is going to have babies on July 4th. These babies are in uterus horn 'A'. Her 'boyfriend' can still have sex with her, and can get her pregnant in uterus horn 'B'--TODAY. Or any day leading up to and including July 4th. Earlier than today, actually. So even if you remove the male from the cage when you see a baby, it is already too late, and you've got ANOTHER litter on the way.
They are not humans: if humans were like chinchillas, then it's the same thing as a person having sex and getting pregnant while already 8 or 9 months pregnant, so that when their first baby is 8 or 9 months old, they have a SECOND baby.
It is really unhealthy for this to happen, because mom chinchilla is trying to produce enough milk for the babies that have already been born, but at the same time she's growing more babies inside of her, and is trying to keep her own strength up too-the chances are very high that she will die when giving birth to the second litter, no matter what 'chinchillas.com' says.
I received a male and female pair of standard chinchillas from a breeder without pedigrees, which is a lot like getting chinchillas from a pet store, in my opinion, and they had a baby who I named Ivan. When he was 3 weeks old, he was paralyzed from the neck down, and I had to take him with me everywhere, even to work, to hand feed him and everything. Are you prepared to sacrifice your summer if something like this happens? You're 14, you have a lot of things you could be doing with friends--none of them involve carrying baby chinchillas around and feeding them, as well as stimulating them so that they poop and pee. Do you think you can sit there and rub a little chinchilla's butt so that he or she poops into your hands? Can you deal with getting chinchilla pee all over your fingers? What if they die? Won't you be sad? Ivan died and I still cry over him--I put weeks of work into making him walk again, only to have him die at 4 months of age. He wasn't even half grown yet.
We do have lives, and all of them involve caring for and loving our animals. We aren't trying to keep you from having fun, or seeing cute little chinchilla babies. We're trying to keep your animals from dying in pain-I am not saying that you're a bad owner, but there are many things that can happen that are out of your control. If your female chinchilla gives birth the wrong way (it's called a breach birth), the chances are almost 100% that she will die; and only in miracles do baby chinchillas survive when the mother dies. I have read of only one instance out of 30 or more on this site.
The least you can do is to contact a breeder in your area who could be your mentor/teacher, who can tell you when things are going wrong, or who might be able to take care of the babies if the mom dies or rejects them. If anyone on this forum is a breeder in your area, they may be willing to help you even if they disagree with your decision.
Please at least think about what you're doing, or have your parents read this thread. I don't think they'd be happy to find out that they could be spending thousands of dollars on chinchillas that may die anyway--if they have Malo, if the mother rejects them, if they spend sleepless weeks trying to keep them alive, or if they catch a cold from you or your family or your other pets.
It's most important for you to know that chinchillas don't get lonely when they are separated from their 'mates'. A chinchilla will be lonely if you don't play with it, or if it is totally ignored, isolated in a room for 20 hours a day or more. Your boy and girl chinchillas will be fine if you separate them. Build another cage. Do the right thing, and separate them now.
I'm going to send this to you in a private message also so that you can at least skim it.