Oh, bullcrap! When and where did her sister-in-law say any such thing? Unless you cite a reputable source for your claim, you should be ashamed of yourself.
You should use google
This is one of tte sources. There are others
https://medium.com/@Blackppl4Trump/l-affaire-of-ted-cruz-c1818b9db18f#.lqm0z766h