Young man gets horny when he meets his lover's sister

My girlfriend will never let me have sex with her. Rubber is essential even though I haven't been on a date in a while. I feel cold in this situation. My girlfriend's older sister seduced me by showing off her big breasts without a bra! I still like her, but my feelings are shaken by my sister's soft breasts! And if you say you can live rough. I can not take it anymore. I looked at the opportunity and rolled up with my sister. The feeling of ecstasy is irresistible excitement. I can't stop squirting when my girlfriend is away.