When fitness model Mariah Morse isn't finger-locked with her new man Matt Rife, she's posted up in the gym, the sauna ... or sportin' bikinis that showcase her toned bod!

Now, Mariah is modeling more sexy stances ... only this time, it's for our scorchin' Hot Shot photo galleries. Sit back and scroll carefully, because Morse is heatin' up!

Take a look ... and while you're at it, you'll notice Mariah loves her fitness regime indeed, but she also loves a good bikini moment!

Beach buns on blast, it's obvi Rife's new girl is workin' hard on her squat thrusts ... as she SHOULD, but let's just hope Rife can handle it 😜!

Check out our rock-solid gallery above and enjoy the smoke show!