Anh sir,
First at all, I must apologize for interrupting you. Send this message I know that you love and care for Dung like me. But when her sister doesn't like that I have a family to come in contact with fierce.
I don't want to cause to her family quarrel. Therefore, to End the relationship with her ,Both also have a good feeling about her., there is a sense of good to her always.I want her live happily and walk on stable. Please take care of her during this time.
Let us know each others ,please don't tell Dung, thank you very much.