It was censored, but I read his lips.
While Winter and Chantel were arguing with Nicole, Pedro asked Chantel to trade him seats. Winter and the mom replied that Chantel wasn't moving. Pedro started the "Aye, aye, aye, aye," pointing in the direction of the parents. The dad seemed unaffected and continued gnawing on the Costco chicken wings, but the mom began arguing with Pedro. Neither were really yelling; they talked over each other but remained seated. River interjected "Who the f$@& you talking to, n----?" That was when Pedro's demeanor changed and he yelled "What you say?" He then stood, River threw something at hit the lamp. Pedro flinched as if anticipating being hit. He then charged around the table and the fight ensued.