Mentira? I'm not sure you would have to give me a little more info on this question Mentira means that what a person is saying is a lie or when you wanna tell someone that what somethin did happen you say "eso no paso" hope this helped.
Answer: ok well maybe its :
1. Elena es abuela de Armando.
2. Luis es hermano de Mariela.
3. Cecilia es hermana de Andrés.
4. Mariela y Luis son hermanos de Andrés y Cecilia.