Aguilera's seventh studio album Lotus was released in November 2012. She described it as a "rebirth" of herself after the personal struggles she had overcome during the Bionic album era. The album has become her least commercially successful album so far. It peaked at number seven on the Billboard 200 and has sold 290,000 copies in the United States. The album was preceded by two singles, "Your Body" and "Just a Fool". During the promotion of Lotus in December 2012, Aguilera was temporarily replaced by Shakira for the fourth season of The Voice and returned for the fifth season in September 2013.  While Aguilera's seventh studio album Lotus was commercially unsuccessful, she subsequently found her revitalized success through collaborations with other artists. She was featured on Pitbull's single "Feel This Moment" in January 2013, which peaked at number eight on the Billboard Hot 100 and was certified double platinum by the RIAA. She subsequently appeared on Mexican singer Alejandro Fernandez's cover of "Hoy Tengo Ganas de Ti", which earned a diamond certification in Mexico. Aguilera's duet of "Say Something" with A Great Big World, released in November 2013, was met with critical acclaim and commercial success, earning a six-time platinum certification from the RIAA and winning a Grammy Award for Best Pop Duo/Group Performance.  Aguilera became engaged to Rutler in February 2014. She gave birth to their daughter, Summer Rain Rutler, in August 2014. For the sixth and seventh seasons of The Voice, Aguilera was respectively replaced by Shakira and Gwen Stefani, clarifying that she wanted to devote her time to her family. She subsequently returned as a coach for the eighth and tenth seasons; for the latter she won with her contestant Alisan Porter and became the first female coach to win the show.  In April 2015, Aguilera played a recurring role as singer Jade St. John on the third season of ABC's musical drama series Nashville. In March 2016, Aguilera and Rutler were announced as executive producers for a new music-based game show, Tracks, to air on Spike TV. Aguilera recorded a song titled "Change", which was dedicated to the victims of the 2016 Orlando nightclub shooting as well as Christina Grimmie, who was fatally shot in Orlando the day before the nightclub shooting, in June 2016. The proceedings were donated to the National Compassion Fund to benefit the victims' families. She further recorded a disco song titled "Telepathy" featuring Nile Rodgers for the soundtrack of Netflix original series The Get Down in August 2016, contributed as a voice actress for The Emoji Movie, and was announced to had been cast for the upcoming film Zoe in May 2017.

Answer this question "Who is the father of Summer?" by extracting the answer from the text above.
Aguilera became engaged to Rutler in February 2014.