Heidi Klum unbuttons her shirt and shows off a sexy lace bra

Heidi Klum, 51, unbuttons her shirt to reveal a fancy lace bra... after making out with her husband on his 35th birthday

Heidi Klum leaves little to the imagination as she playfully and seductively unbuttons her shirt in the car to give fans a sneak peek at her lovely necklace and a very sexy lace bra in this Instagram video.