A Russian weight loss influencer who cheated on her husband with his son is now married to him.   Marina Balmasheva, 37, married her stepson Vladimir Shavyrin, 23, after ending her relationship with his 47-year-old father Alexey Shavyrin.   She now has two children with Vladimir Shavyrin, while heartbroken and jilted Alexey has been left to care for the…