The Bexar County Sheriff's Office is asking for your help in locating two teenage girls who went missing Thursday morning.

The step sisters were last seen leaving their home on the northeast side.

Their mother, Christina, Martinez says she's desperate for them to come home.

"I haven't eaten much in three days. I feel guilty when I go shopping or I eat because I don't know if she is," she said.

Martinez says her daughter 13 year old Nicole Campion and step daughter 14 year old Genesis Martinez told her step son they were going for a walk Thursday morning. The pair had run away earlier that week and were found 48 hours later at the 14 year old's mother's home. Martinez says she's seen the girls active on Instagram, but has no idea where they are.

"Wherever they are, they're just going to keep traveling around," she said.

Friday the Bexar County Sheriff's Office posted a picture of the two girls. Saturday morning she heard from a classmate's mother, saying they had been in contact with her daughter.

"They're just out there having a good old time. Nicole is following along and hopefully, this helps and they're going to run out of options. People are going to start talking and reporting them. This is not funny, they're missing school," she said.

She says while it's comforting to hear that they've been in touch with friends, she's worried that something much worse could happen if they don't come back soon.

"I was seeing other missing children being prostituted out against their will, taken to other states and that's what I worry about," she said.

If you have any information about the teenagers, call the Bexar County Sheriff's Office Tip Line at 210-335-TIPS.