Gabrielle Union and Dwyane Wade allow their children to “feel free” — but within reason. “We give them freedom to be their full selves, and we support that in every way, shape, and form, with no limitations outside of character,” Union, 53, told Us Weekly exclusively at The Abbey’s 35th Anniversary in West Hollywood on Wednesday, May 20. “They’re not going to be an a**hole, but anything else, sky’s the limit.” Union and Wade, 44, wed in August 2…