Sempre tua in Italian means "always yours" as said by a girl or woman in English.
Sempre la tua in Italian means "always yours" in English.
"Forever your beautiful sister" in English is Per sempre tua sorella bella in Italian and In perpetuum tua soror pulcherrima in Latin.
La tua in Italian means "yours" directed to a woman in English.
"Your sister" in English is tua sorella in Italian.
"Your family" in English is la tua famiglia in Italian.
"Your house" in English is la tua casa in Italian.
"I will be your guide!" in English is Sarò la tua guida!in Italian.
"For your Mom" in English is per la tua mamma in Italian.
"How is your family?" in English is Come sta la tua famiglia? in Italian.
questa è la tua risposta
"Your loving grandmother" in English is la tua nonna amorevole in Italian.
"Where is your home?" in English is Dove si trova la tua casa? in Italian.