Describe your ideal in-laws. What would your perfect mother-in-law be like?
They would be like my parents, very friendly and trustworthyed.
They would be like my parents, very friendly and always trust each other. (trustworthy means, that people may trust them, i guess You mean that parents trust each other - it's more importent in each famely).
My ideal parents-in-law, would be as my parents, very friendly and trusting.
Trustworthy. Very good.