Penny Lancaster and her husband Sir Rod Stewart reunited with the rest of the family for a sweet family update this weekend. The moment would’ve been made all the sweeter as singer Stewart, 79, looked in high spirits despite being diagnosed with COVID-19 and strep throat in the past few weeks. The singer admitted he was “absolutely gutted” to announce he’d be cancelling a show in Vegas at the end of his residency due to strep. And just a few days later, his Instagram account released a statement revealing a Covid diagnosis led to the postponement of another set of gigs in California and Nevada…