which relation is thicker than blood relation?

i hope u will allright as i think no relation in the world is a good relation for u till u can not make it powerfull by ur love according to ur Q a relation is here which is moe thicker than Blood which is a LUV relation b/w a sincere male and sincere female but this only can reach on its last stage means remain ever if both hav esame mind are sincere with each other otherwise itis impossible