First rule of nutting is that it stays in the hole you're in. Pulling out to cum is weaksauce. If it's too much for them to swallow, they can act accordingly but you best try your best to keep your dick in that hole til you're done.
she is fantastic, love how she sucks cock and how happy she is when the cum starts hitting her face and tongue, would love to get blown by someone as enthusiastic as she is