(Yahoo!News) Krista Grubb never thought that working out with her 13-year-old son Mason Halye at the LA Fitness gym in Palm Harbor, Florida would get her membership revoked, but that’s just what happened.

As reported by WTVT Fox 13, Grubb, a fitness trainer, was happy to guide her son as he began to lift weights. “I was really excited to have him come in and lift and see the changes in his body that I saw in mine,” the mom said. “Through lifting weights and just working out, I gained a lot of confidence.” The mother and son began to work out together at LA Fitness. Mason enjoyed it and said, “It was a good like, bonding time for me and my mom.”

The two continued their workouts together with no issue until last week. Grubb recounted, “One of the trainers approached me and asked me what I was doing. I told her I was working out with my son.”

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