When we all started to go to bed, I had sex with my girlfriend on the pullout couch we were sleeping on and we finished and I was uncomfortable on the couch.
A girlfriend is a female friend or acquaintance, often a regular female companion with whom The word 'girlfriend' was first used in 1863 as 'a woman's female friend in youth. the term 'girlfriend' for an adult romantic partner, stating, 'Companion is a suitable term for an unmarried partner of the same or the opposite sex.