These nipples and titties just ask for playing with them and the only way her face looks even better is when seeing her sucking my dick.
Seeing her large nipples makes me think she loves it when guys use a little force on them. So instead of using a hand on her head for directing her mouth towards my dick i would gently squeeze and pull her on her nipples towards me. Think she doesn't instantly follow but when her titties are stretched forwards she can't handle the pressure so she will give in to be pulled towards my dick for a good blowjob.
Like i said i like her face, but when finishing i will definitely cum on her titties, must be pretty amazing to see a huge cum load on these.