Madonna’s kiddos are growing up! On Tuesday, August 27, the music legend, 66, took to Instagram to share a reel of her twins Stella and Estere’s lavish 12th birthday celebration, which was attended by the superstar’s rumored boyfriend, Akeem Morris. “Happy Birthday to my Twin Virgos! ♍️♍️. Estere and Stella!!!” Madonna penned in the caption of the video. “I blinked and you are almost teenagers … Time is a ferocious Beast!! You are both SO FIERCE — talented — opinionated — and full of LIFE. Can’t wait to read the next chapter … LOVE YOU BOTH SO MUCH!!! 💜💚💛🩵🩷💛💙♥️🖤🤎🤍.” In the glimpses into th…