Five of Meghan's closest friends also spoke out against " the global bullying" they are seeing against the duchess in a series of interviews with People magazine.
Meghan and Harry's outing comes just one day after the expectant royal was defended by George Clooney, who attended the pair's wedding a year ago.
They may have been spending their first Valentine's Day as a married couple apart, but the two British servicemen Prince Harry was visiting in the Arctic Circle ensured wife Meghan was never too far from his mind after creating a "shrine" dedicated to the couple.
"She's been pursued and vilified", Clooney said at a promotional event for his new film, according to the UK's Press Association (PA) news agency.
Betway's Alan Alger said: "There is serious momentum gathering behind the idea that Meghan Markle is expecting twins and having cut the odds on that happening earlier in the week, sustained support has seen us significantly shorten the price again".
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On Sunday, President Bouteflika returned from Switzerland where he had been receiving medical treatment. Ghania Bellal, a journalism student, said Bouteflika "is mocking us".
Last week one paper published a highly personal letter they said was written by Markle to her estranged father in which she begged him to "stop lying.stop exploiting my relationship with my husband".
"You're taking a letter from a daughter to a father and broadcasting it everywhere".
The Duchess of Sussex is reportedly due to give birth to her and Prince Harry's first baby in April.
Diana died in a vehicle crash in a Paris tunnel in 1997 while being chased by paparazzi on motorcycles.
Last month, five of Ms. Meghan's close friends told People magazine the duchess had endured "lies and untruths" and "global bullying" and they anxious how this would affect her and her baby. "I'm sort of surprised by that".