Sept. 24 (UPI) -- Kailyn Lowry was among the guests at Jo Rivera's wedding to Vee Torres.
The 26-year-old television personality said in a tweet Monday that she "cried tears of happiness" during her ex-boyfriend's nuptials to Torres on Sunday.
"Y'all really want me to still be bitter about Jo & Vee. We've come a long way since we were 18," Lowry, who shares 8-year-old son Isaac with Rivera, wrote.
"I couldn't ask for a better stepmom for isaac," she said of Torres. "Literally cried tears of happiness for them last night. that's fam."
Y’all really want me to still be bitter about Jo & Vee. We’ve come a long way since we were 18. I couldn’t ask for a better stepmom for isaac. Literally cried tears of happiness for them last night. 💖 that’s fam— Kailyn Lowry (@KailLowry) September 24, 2018
Us Weekly reported Rivera married Torres in Bloomfield, N.J. Isaac and Vivi, Rivera's 2-year-old daughter with Torres, served as ring bearers during the ceremony.
Lowry brought Isaac and best friend Becky Hayter as her dates to the wedding. She shared a family photo with Rivera and Isaac during the reception.
"What a great wedding," the star wrote.
Lowry and Rivera were high school sweethearts who split shortly after Isaac's birth in 2010. Lowry is also parent to 4-year-old son Lincoln with ex-husband Javi Marroquin and to 13-month-old son Lux with Chris Lopez. The Teen Mom 2 star described Rivera as her "best friend" in an interview with MTV News in 2017.
"I can tell him anything. I can call him, and we can switch weekends easily or if I need him to grab Isaac from school. We are so good now," she said.
Teen Mom 2 co-stars Jenelle Evans, Chelsea Houska, Leah Messer and Briana DeJesus.