Almost like clockwork, things take off for Bill when he notices Rita's erect nipples under her T-shirt. That sign of her readiness flicks his switch.
He pulls up the bottom of the shirt to get access to her belly. It's soft, and warm, and even his slightest touch gets a response. He lingers around the beltline for a while, giving her belly a little massage, occasionally sticking a finger inside her shorts to signal what's coming. As her kisses become more passionate, and her breathing becomes deeper and more rapid, he slides his hand down her shorts. Grazing over her silky pubic hair his hand is welcomed by a swollen clit just aching for attention. A simple probe of his finger in her opening tells him what else will greet him.
Rita in the meantime has her hand around a very erect penis that has long outgrown his shorts. She is firmly grasping its base and giving it small, persistent strokes to induce more length and girth. How big and hard can she get it? it's always a contest for her, one they both enjoy immensely.
Their mutual fondling goes on and on, slowly getting more energetic and fervent. It's like they are musicians, only they are playing each other's instruments. It creates tremendous synergy - the excitement he gives her, is returned by her to him, and cycled back again. Long years together have given each intimate knowledge of each other's bodies. Each one knows how but the slightest push or prod can induce great arousal in their partner.
Experienced fondlers can take it any number of places, each one with its own delicious form of climax and connection. There are times when Bill knows Rita is getting out-of-control excited, and gets her over the edge. He will enter her deeply with his middle finger, while massaging her engorged clit with his palm, letting her ride him as he pulls up her shirt and sucks on her nipples.
There are times when Rita knows she has Bill at the point of no return and keeps him going and going with faster, more insistent strokes. She may take him deeply in her mouth and "drain him dry," as they kiddingly call it. Or she may let him spray all over her hand - and the cushions, and the couch. Always good for a laugh.
But sometimes they will pull back just a bit so they can get to the next stage. Rita will remove his hand from under her pants, and take her hand off his erection. Looking at him lovingly, she will stand and face him. Remove her top and shrug down the shorts. Eyeing first that inviting hard-on and then the smile of her adoring lover, she will then straddle him, and let them both reap the rewards that fondling can bring.