Madonna real-estate portfolio is expanding again. The Material Mom is said to be shelling out $16 million for a house near Harrods department store in London. Last month Madonna reportedly paid $6 million for a 1927 villa in Beverly Hills. The four-story London house includes six bedrooms, a gym, a heated pool, a wood-paneled library and a dining room with a stained glass dome, according to news reports. Madonna will reportedly share it with her daughter Lourdes, 3, and the film director Guy Ritchie. Ritchie, 31, and Madonna, 41, are expecting a child later this year. Ritchie, meanwhile, received a slap on the wrist from Scotland Yard late last week after admitting he had assaulted a fan outside Madonna’s rented London home on May 17. Ritchie was cautioned for common assault, said a spokesman for the Yard.