The claims come as New Idea publish images of Erica holding her stomach during a day out with the London born singer off the coast of Balearic party island Ibiza.
Sporting an orange vest, the brunette is seen with a palm pressed against her abdomen as the couple make their way across the beach.
In the 1980s, Seal spent a short time singing in local clubs and bars.
Interestingly, both Donald and Heidi also have sons who are the same age — Donald and Melania's only child, Barron, is 11 years old and Heidi and her ex-husband Seal's eldest son, Henry, is also 11. Heidi was first hitched to actor Ric Pipino from 1997 until 2002.
She then dated Italian businessman Flavio Briatore and the two welcomed daughter Leni together in May 2004. Heidi Klum Shares a Fun Photo of Herself With Her and Seal's 4 Kids — See the Pic!
He must be glad that “Kiss From A Rose” publishing is getting a boost thanks to the “Vacation” movie.
Seal and Heidi were spied having a family dinner with the kids at Nobu in NYC this weekend.
Erica is already a parent to Indigo, seven, Jackson, five and two-year old Emmanuelle with Packer, while Seal is a father to Henry, 10, Johan, eight and five-year old Lou with his ex wife, German supermodel Heidi Klum.