Can someone who was also one of the heirs responsible for an inheritance not being divided up among the heirs , file a lawsuit against me years later?

I am being sued by my cousin in Spain where I am originally from, (and have been a U.S. citizen for 45 years, for the division of an inheritance that was suppose to be divided up in 2008 among my sisters and brothers, one aunt, and my cousin and his sister. They could not agree on who would get the house. My cousin back then is also responsible for why the inheritance was never divided up. I have been served to appear in a Spanish court via video conference. The inheritance is not that much and as I understand I will be paying his legal fees (and it looks like he really went to town with with attorney and lawyers.