Mom showed daughter photos of male female?

So, your daughter's mother talked to her about how her body works? There's nothing wrong with that, it's actually a very reasonable age to be having that conversation, she had questions and her mother answered them in a factual way. 

What do you need advice about? She can't un-see it. 
In my opinion your mother did the right thing by answering her questions properly instead of waiting until she went about finding out the difference on her own.  

I disagree strongly with your claim that your daughter isn't old enough to learn the facts of life. If she's old enough to be curious, and she is, and she's old enough to start asking questions, then YES, she's old enough to hear the facts about where babies come from. And on a related topic... the average age of menarche, or first menstruation, has been dropping steadily over the past 25 years or so. Puberty and periods have been observed in girls as young as 8 years of age, so your daughter is NOT out of line in asking questions about her body and about the development of boys.

YOU need to get over your embarrassment and answer your daughter's questions in a calm, rational way, using language that she understands and can relate to. Take care NOT to talk over her head. This conversation needs to be held in private, yes, but it needs to be done on YOUR DAUGHTER'S level, NOT YOUR level.

Another thing you need to be aware of is that your daughter will be getting introduced to the mechanics of reproduction (including human reproduction) in her science classes in school in just a few more years. She'll also get information about menstruation when she reaches middle school, starting in the 5th and 6th grades. It's important that she get the facts when she's supposed to, because it will save her a lot of needless worry about getting her first period. Some of her health classes may also include information about contraception and how to prevent sexually transmitted diseases as well. That information is also extremely important, because it will help your daughter make informed decisions about a whole range of different issues. And contrary to popular myths, teaching kids the facts about sex DOES NOT LEAD to early sexual behavior or sexual promiscuity. This has been well documented over many decades of research- you can look it up on Google and read the reports about it if you doubt me. The reality is that girls who are taught the facts of life early are actually MUCH LESS LIKELY to experiment with sexual behavior before they should. Ignorance is NOT BLISS when it comes to sex and reproduction.

"The drawing type of photos."

You mean diagrams? 

Overreacting, dude.

Let it go. 

As long as it wasn't porn, I think it's OK. The learning of sex ed early on actually helps prevent our kids from having sex and getting pregnant. 

They need to know and the parents should be the ones that should show them the difference between a male, and a female.

If she's old enough to ask the questions, she's old enough to to be given serious answers. Many girls have their first period as young as 10. That's only a year and a half from now. When were you expecting to spring that on her? I say thank "the mom" for doing your job and being prepared with appropriate educational materials -- ask her where she got them for when your daughter comes to you with follow-up questions.

DO YOU KNOWETH IF YOUR 8 YEAR OLD IST AN BOY OR AN GIRL?

This could be a crime of hurting the morals of a child or something like that

It's probably a good idea. If you have a sexual confused child how will you get grandchildren?

thank goodness someone responded to this child's need to know and provided clear, factual information about sexual realities.  Many parents fail to see that their growing, maturing child needs basic information about the facts of life.  She is not too young to wonder about this and need to know more.

Your daughter is defiantly old enough to begin learning these things and there is nothing wrong with your wife explaining it to her or using the diagrams to show her. Your daughter is getting to the age where girls will be starting to get their period soon some kids in my class begin as early as 9. 

Your wife teaching your daughter now is not inappropriate it is better she goes to her mom with these questions and get correct information then get incorrect information from her friends.

My brother was born when I was nine. I was changing his diapers and wiping his butt, and I was certainly aware of the differences between boys and girls. I also knew about my mother's pregnancy. Kids who have younger brothers and sisters know all about the anatomy part. Most kids that age find the whole thing about how the sperm fertilizes the egg pretty icky, and are certainly not inspired to want to try sex!