Nothing. She's nearby and probably will notice you

You were so horny, you sniffed into the bag and savored the musky, sweaty aroma of the content inside. You wanted to take them all home.

However, your human brain decided that stealing things from her bag right here, right now is not the best course of action. Instead you hid in a place not too far away and waited for her.

A short while later, you saw Mathilda walk to her bag to get her drink. She was wearing long sleeved polyester polo shirt, a pair of shorts and a pair of leggings under that. Her sport attire was form fitting enough to show her curves and muscles. You could also see dark sweat patches on her back and underarms. She must have been enjoying hot, sweaty exertions under bright afternoon sun.

And you think you saw her wearing the same clothes to the gym yesterday. Did she not change clothes? You also remember her heading straight home without even stepping into shower room.

Whatever, She put her water bottle back in after she finished drinking and started walking into the woods surrounding the tennis field. What is she doing? Is she going to..... nah, maybe you should follow her.