I know this sound stupid and but all my sister and I want to bury our sister her boyfrind has the ashes and redused to give them back they were not married and have no kids all we want to do is bury her with our parnets who also all passed away in 2010

Some states may have laws on this subject, but in order to really help you we would have to know which state (or other country if non-U.S.) you are in.

How did the boyfriend get the ashes and yes ANY question on law needs to include your general locale as laws vary by area.

Did the boyfriend pay for the cremation ?