Gus and Emily Forrester's daughter Leni has Sanfilippo syndrome, a neurodegenrative disease that affects one in 70,000 children. There is no cure but a US trial is due to begin later this year.
The German-American model, 52, and her daughter, 21, stunned fans back in 2022 when they posed together in lingerie for brand Intimissimi for the first time.
Berlin Zoo’s panda twins Leni and Lotti celebrated their first birthday on Friday with bamboo, colourful ice cream treats and a large red wooden number one.
Heidi, 51, was in an ivory bra and underwear set with a silky robe while her mini-me kid, 20, had on a black bra and undies. The last time they posed in their lingerie side by side they were blasted.
FEMAIL has revealed everything you need to know about Leni, 20 - from her lavish childhood and impressive career to her relationship with her father and her love life.