Ben Affleck and Jennifer Lopez are still spending time apart as rumors of a split continue to swirl, RadarOnline.com has learned. A source close to Lopez told PEOPLEthat the Hollywood power couple, who have reportedly been living in separate homes, “did not celebrate Mother’s Day together.” Lopez, who shares her 16-year-old twins Max and Emme with ex-husband Marc Anthony, celebrated her relationship with her children and her own mother in two Instagram posts on Mother’s Day last weekend. “Lulu and Max, I am here FOREVER to support you, encourage you, to remind you of your greatness of your goo…