She was with a partner, a new partner, glad to be doing things, and they reached a point where that was as far as she was interested in going and so she said no.
Она была с новым партнёром, они с удовольствием занимались чем-то и достигли момента, дальше которого она не хотела заходить, и поэтому она сказала: «Нет».