By Joel Leaver Matty Healy and his partner Gabriella Bechtel enjoyed an evening out with his family this week, having supported his mother Denise Welch over the launch of her latest project. Denise, 65, is currently starring in the Gap at the Hope Mill Theatre in Manchester. Her son Matty, 34, and his partner, 26 – who’s better known by her mononymous stage name Gabbriette – came to see the play together on Thursday. Gabbriette – who fronts punk rock band Nasty Cherry – spent time with Matty’s family at the show, including his younger brother Louis Healy, 22, and their father Tim Healy, 72. Th…