The Basic Instinct star explained her reasoning on Instagram January 06, 2021 - 11:44 GMT Gemma Strong Sharon Stone sparks confusion as she questions whether she is related to Beyonce's mum, Tina Knowles Sharon Stone caused a stir on Instagram this week, as she questioned whether she could be related to Beyonce's mum, Tina Lawson. The Basic Instinct actress sparked confusion amongst fans after commenting on a post on Viola Davis's Instagram page in celebration of Tina's birthday this week. Viola had shared a snapshot of her friend, and wrote: "Happy birthday to @MsTinaLawson!! You continue to inspire and amaze me." Among those to respond to the post was Sharon, who wrote: "R we related? That's my mom's maiden name." She then clarified: "Lawson."