gianna's very artistic. loves, like, animals. >> reporter: but this story is about what sandra claims is not captured on home video. she says despite those smiling faces, there was a shocking, ugly secret in the family. years of emotional and physical abuse by david. what would he do? >> throw things, hammers at me if he got mad, um, there was black eyes, there was broken ribs. we had to lock ourselves in the bedroom because we were scared. we just didn't know how his behavior was going to be from one day to the next. >> reporter: during all those years during the marriage, did you ever take any photos? ever seek medical help? >> yes. we had photos, and we have police reports that prove it. >> reporter: and she claims david didn't just target her, but went after the children too. how often did that happen? >> once is more than enough. it happened a lot. >> reporter: after 20 years of marriage, sandra says she reaches her breaking point and finally files for divorce. she says, frightened for her life, she als