Rihanna gave birth to her second son Riot Rose, just six months ago, but some fans are convinced baby number three is on the way as they think she’s been ‘hiding’ her baby bump on a trip to Milan. The music star has two adorable sons with partner A$AP Rocky, who recently hinted his girlfriend is ‘working on new music’. However, if fan suspicions are correct, we may be waiting longer than we hoped. But Rihanna fans have been waiting eight years, so we’re used to it by now… Rihanna fans convinced she’s hiding ‘baby bump’ in Milan – as third pregnancy rumors circulate The celebrity couple were sp…