Lorena Recabarren attended country's first same-sex wedding
Country's president said measure violated international treaties
Country's marriage equality law took effect on March 10
Plaintiff criticized government 'crusade against same-sex marriage'
Two same-sex couples married in country's capital on Thursday
State Sen. Adam Ebbin rejected claim during committee hearing
Proposal could pave way for marriage equality
Sebastián Piñera in June announced support for measure
South American country legalized civil unions in 2015
Vote took place two days after presidential election's first round
