Hiding sex pills bad?

My husbands been hiding pills in his car, ive seen it like 3x already. White and blue rectangle ones, i found out that theyre sex enhancement pills for men. He says hes doing it for us both, but im guessing that if he is, he wouldnt be hiding it from me. Dont you think so? Last time he got some from the gas station bathroom, and he told me about it. But idk why he hid these from me. I have a feeling hes cheating on me with those pills. What do u think?