Following a scrappy start, the turning point arrived midway through the first half when Amie Fleming was forced off with a nasty head injury.
Rovers had dominated possession up until this point, but with only 10 players on the pitch, Forest capitalised. A long ball to the right-hand side was crossed into the box and Amber Hughes produced a fine first-time finish from six yards.
Rovers responded well, again putting Forest under pressure and creating chances, but the hosts failed to find the back of the net.
The visitors always looked dangerous on the counter-attack and doubled their lead just before a break. Rovers failed to clear their lines from a corner and Hughes smashed home her second.
Rovers came out strongly at the start of the second half, looking comfortable in possession and creating further opportunities. Early on, Nichol Forster went down the line and cut the ball back to debutant Nikki Emery, who fired over from close range.
Forest then added a third shortly after, as again Rovers were unable to deal with a ball into the box and Kirsty Allen converted.
Rovers did manage to get a goal their play deserved. Helen Seed won the ball before finding Keira Walsh, who played a fantastic through ball into Forster, who slotted past the keeper.
Forest hardly got out of their half, but Rovers just couldn’t find that clinical, cutting edge to their game that they need rediscover.
Assistant manager Amanda Goodwin said: “We dominated from start to finish, but have come away with another loss. It’s very disappointing and quite disheartening for the girls to play so well, but then get done by three silly goals.
“On a positive, we’ve got to keep moving forward, we’ve got to push on together, we’ve got to regroup and get ready for a massive game this Friday against Preston in the final of the Lancashire Cup. It’s a local derby, so the girls won’t want to lose. Hopefully they will bounce back and perform on the night.
“We’ve got so many injuries at the moment, we had about six injured players on the bench. Amie got a head injury and Chloe looks like she’s pulled her hamstring, so we’re down to the bare bones. We’ve just got to stick together, we’ve still got a few games in hand, so we’re not worrying yet and hopefully we can turn it around.”
ROVERS: Hutcheson, Fleming (Emery 25), Seed, S. Hardy, Bourne, Flynn, H. Forster, Walsh, N. Forster, Musker (Goodwin 46), Adams (Pennington 80).
Subs not used: Savage.