Some info from the wonderful book by David McIntosh "The Unkhown Habsburgs" :
"Assunta entered a convent in Barcelona with the intention of becoming a nun, but was forced to flee when the convent was destroyed during the Spanish Civil War in 1936...At the age of 37 Assunta married a Doctor, Joseph Hopfinger, who originated from Galicia. He was Jewish and as remaining in Europe at that time was unsafe, they emigrated to the USA. The couple, who had 2 daughters, Maria Teresa and Elisabeth, divorced in 1950. Assunta spent the rest of her life in Texas and died in San Antonio in 1993."
Some additions:
Assunta entered the covent of the Carmelites of the Holy Teresa in Tortosa which is in the southwest of Barcelona in 1924. She stayed there unil the end of 1936 when the nuns had to flee for Roma. Because there were to many nuns in the monasteries, Pope Pius XI. released those who had relatives from their vow.
On 16 (civil) / 17 (religious) September 1939, Assunta married Dr. Joseph Hopfinger in Ouchy in the south of Lausanne (CH). Hopfinger was born on 14 March 1905 as the son of Aron Hopfinger and Sara Rachel Roth. Their daughters are Maria Teresa (born Barcelona, 12 May 1940) and Juliette Elisabeth (born New York, 30 Oktober 1942). Juliette changed her name "Hopfinger" into "Habsburg-Bourbon". Assunta and Hopfinger got divorced in San Antonio on 25 July 1950.
Assunta didn't marry again and died at Saint Teresa's Academy (San Antonio, Texas) on 24 January 1993. She was 90 years old.
After the divorce, Hopfinger married a woman called Helen N. He also changed his name into Joseph Hoppin, but I don't know when. He died at Charleston (South Carolina) on 23 August 1992 aged 87.