Jennifer Lopez showed off her sexy curves in Miami again, wearing a black bikini and spending time in the pool with twins Max and Emme on Saturday before having some alone time with boyfriend Casper Smart.

Jennifer looked a bit camera-shy during her time with Smart; 18-years her junior; appearing to hide herself from watching eyes by wearing her towel into and out of the water with help from her boy-toy.

J. Lo's son Max reportedly squirted a security guard with water, according to

The "Jenny From The Block" singer is planning to release a new movie soon which will document her life over the past few years -- from becoming a mother of twins to her two seasons on American Idol to her return to music and movies.

The new film, called "Dance Again," will be shot in 3D.

Last month she also enjoyed some poolside downtime in Las Vegas (pics).