Meghan Markle's half-sister is fuming that she didn't make the cut for the royal wedding. Samantha Grant is reportedly estranged from Meghan. Grant is wheelchair-bound after being diagnosed with multiple sclerosis. Grant shares a father with Markle and tweeted Wednesday, “At issue is not a matter of closeness as more than 1,000 complete strangers are invited. Family is family.” She's upset that Meghan and Prince Harry invited regular folks to the ceremony.