Most likely, he's bitter because his son didn't receive a scholarship offer from UT.
However, he could just be one of those overprotective parents that shelters his children way too much. The girl could've been standing really close, and to him, that's the same as sex, so he overreacts.
Some people are crazy like that. Wasn't there also a parent of a recruit that visited UT during the "wild boyz" scene (when the coaches took their shirts off and jumped around), who said he was going to contact a lawyer and sue UT for sexual harrassment?
I'm sure the lawyer he contacted laughed in his face. Nothing came of that, and nothing will come of this.