Shanahan married Google co-founder Sergey Brin in 2018; they separated in 2021 and divorced in 2023. She reportedly has a net worth over $1 billion, primarily as a result of her marriage to Brin.
To add, the divorce occurred after she allegedly cheated on Brin with Elon Musk, who had just recently been given a $500,000 lifeline by Brin while on a longterm-stay (rent free) at Brin's house.