Some plays dwindle in your rear view while others stay with you forever.

Brad Fraser's look at life in a family with a widower dad, his disabled son and a sister with intimacy issues comes rushing towards you all at once - opening with a deliberately awkward scene.

Returning to the stage after 17 years, Greg Wise plays the aptly-named Jake Sturdy, who we see lifting his naked teenage son Joey into a bath as he squirms in his arms. When he gets an erection his dad is momentarily struck dumb, before tenderly telling him it's "perfectly natural" and when Joey makes the first of his many well-timed quips the tension dissolves into laughter.

The play follows this loop again and again as it expands into a heart-wrenching but hilariously dark look at the issues they face, such as Joey's fear that no one will love him and teenage desire to break away from home and Jake's loss of libido and eventual disability, which sees their roles eventually almost reversed.

Wise is wonderful as the burdened Jake who is willing to do literally anything, it seems, to make his son happy, taking on tasks that would seem unthinkable to many of us.

Oliver Gomm is superb as Joey, not only mastering the challenges of his physical afflictions but also capturing the angst and frustrations of a teenager to amusing effect, and both take on the physical and emotional challenges of their roles whole-heartedly.

The female characters are sadly a little underdeveloped.

Twyla is played well enough by Charlotte Harwood but her interactions with the other characters left me feeling apathetic, and despite Joey's friend Rowdy (an excellent Jake McMullen) explaining cheekily "Mildly retarded and well hung. Few can resist", their affair seems ridiculous.

Jake's married lover "I'm Robyn with a Y"... "Wouldn't that be Yobyn?" is played sensitively by Anna Wilson-Jones but her emotions felt cut short.

One reviewer said the playcould not be further from her experiences as the parent of a disabled child, which I'm sure is true.

It does in some ways present a rather clichéd view and at first seemed to diminish in my mind rapidly, with many of the jokes that made me laugh so hard at the time already forgotten.

But Jake is not only a parent but also a widower, a concerned brother, a surrogate dad to Rowdy and a frustrated writer.

And what has stayed with me from Kill Me Now is that it is much more than story about disability but about the sacrifices we are willing to make for each other’s happiness. Jake has given up his career for his family, Rowdy sacrifices his personal life to help care for his friends, Robyn risks her marriage to be there for the man she loves.

And Joey - as his dad lies twisting with pain in the same bathtub he once laid him in - tells him: "I'll stay with you until the end".

And that is what has stayed with me, the question: "How far would you go to make those you love happy?"

Park Threatre, Clifton Terrace, Finsbury Park, until March 29. Details: