An ultrasound student who offered to scan her sister while she was in school got a huge surprise when she discovered her sibling was actually pregnant. Unsuspecting Rachel Rodriguez, a student at San Joaquin Valley College, in Bakersfield, California, had no reason to suspect sister Crystal Vang was pregnant, as her sibling had asked her to perform a scan for a completely different reason. Crystal had explained to her sister she'd been experiencing painful menstrual cycles, and so Rachel offered to check her out to rule out the likes of cysts or fibroids. Secretly, though, Crystal had a big surprise waiting for Rachel, as a few weeks before she was due to be scanned, a pregnancy test revealed she was set to have a baby. Having sat down in the room with her sibling, Crystal went through the motions, explaining to her sister what her pains had involved, before opting for a simple abdominal scan. With a family member secretly recording – and college staff working on the other side of the curtain – Crystal watched on as Rachel scanned her belly. Then, when the moment of realization hit, Rachel could not help by smile, looking closer and closer at the screen to make sure what she was seeing was her new niece or nephew. When Crystal confirmed that she was pregnant, the pair then burst into hysterical laughter.