Impregnation fantasy - Fucked during home birth

Description: Panic stations this morning as my girlfriend goes into labour. she is not gonna make it to the hospital so we have to do a home birth. with the doctor on the phone, he tells me to everything i can to help calm my girl. it’s when i begin to rub her body that things change. she pulls my hand to her pussy and tells me to continue satisfying her. the doctor suggests the best position for the labour is in doggy. with it coming out in a minute, it makes the arsehole even tighter. i wonder what will cum first me or it.