@musicfreak12: Likely she got a bit too moist when she clenched up her muscles, hence her then reaching for a tissue.
It was probably due to Mako's own embarrassment that she didn't read about the
features of the toy, and just grabbed and paid for whatever item seemed basically similar to the Dragon.
The vibe is giving Mako a continuous, gentle sensation, on her clit, based on its position in the panel where she turns it on. This is much different from the intense and somewhat painful experience she gets from Shinichi's passionate jabbing into her "abalone". I said this before, what she needs is a gentler performance from Shinichi; and all that goes well will cum well.